The table lists various contaminants, some of which are specific chemical compounds, while others represent compound classes or mixtures with varying compositions. The effectiveness of activated charcoal in combating odors depends on factors like air concentration, humidity, and temperature. The numbers provided in the table represent typical or average scenarios and may differ in specific cases. The capacity index is explained as follows:
A. High capacity for all substances in this category. Approximately 20% to 50% of its weight (average 33.3%) can be adsorbed. This category encompasses most odour-causing substances.
B. Satisfactory capacity for all items in this category. These are suitable for applications, although their capacity isn’t as high as in category 4, adsorbing about 10% to 25% of their weight (average 16.7%).
C. These substances are not highly adsorbed but may provide decent service under specific operational conditions. Individual evaluation is necessary.
D. Low adsorption capacity for these materials. Activated carbon isn’t suitable for common use in these cases. Impregnated carbon is recommended to significantly enhance adsorption capability.
Carbon Adsorption Table
| wdt_ID | Chemical / Material | Adsorptional Ability | Description |
|---|---|---|---|
| 1 | Acetaldehyde | C | Acetaldehyde is a colorless, flammable liquid with a fruity odor. It is commonly found in nature and is a natural product of the fermentation of sugars and ethanol. Acetaldehyde is often present in ripe fruits and is a key component of the aroma of apples. It can also be produced as a byproduct of industrial processes, such as combustion, and is a recognized air pollutant. |
| 2 | Acetic acid | A | Acetic acid is a colorless liquid with a pungent, vinegar-like odor. It is a crucial component in vinegar and is widely used in food preservation, as well as in the production of various chemicals and plastics. It can be found in household cleaning solutions, and its characteristic odor is often associated with vinegar-based products. |
| 3 | Acetic anhydride | A | Acetic anhydride is a colorless liquid with a strong, acrid odor. It is primarily used in the chemical industry for acetylation reactions and the production of pharmaceuticals and synthetic fibers. Its distinct odor can be detected near industrial facilities and laboratories where it is used. |
| 4 | Acetone | B | Acetone is a volatile, flammable liquid with a sweet odor. It is a common solvent used in various industries, including nail polish removers and paint thinners. Acetone can be found in some household products and is known for its characteristic, sweet-smelling vapor. |
| 5 | Acetylene | D | Acetylene is a colorless gas with a garlic-like odor. It is used as a fuel in welding and cutting applications due to its high flame temperature. |
| 6 | Acids | B | Acids encompass various corrosive substances with pungent and sometimes caustic odors. They can be found in numerous industrial processes and chemical reactions, contributing to the distinctive smell in chemical laboratories and manufacturing plants. |
| 7 | Acrolein | B | Acrolein has a pungent, unpleasant odor and is a flammable liquid. It is commonly encountered in the environment as a byproduct of combustion, particularly in the exhaust of vehicles and industrial emissions. |
| 8 | Acrylic acid | A | Acrylic acid is a colorless liquid with an acrid, vinegar-like odor. It is used in the production of various plastics, adhesives, and coatings. The distinctive odor of acrylic acid is often noticeable near industrial sites where it is employed. |
| 9 | Acrylonitrile | A | Acrylonitrile is a colorless liquid with a sharp, sweet odor. It is a key chemical used in the production of synthetic rubber and plastics. The smell of acrylonitrile can be detected in industrial facilities and areas where these products are manufactured. |
| 10 | Adhesives | A | Adhesives are materials used to bond objects together. They come in various forms, such as liquid, paste, or tape, and may have different odors depending on their composition. They are commonly found in construction, woodworking, and everyday household applications. |
| 11 | Alcohol | A | Alcohol, specifically ethanol, is known for its characteristic alcoholic odor. It is found in alcoholic beverages like beer, wine, and spirits. The aroma of alcohol is familiar in social settings, bars, and homes where alcoholic drinks are consumed. |
| 12 | Alcoholic beverages | A | Alcoholic beverages encompass a wide range of drinks containing alcohol. The specific aromas vary depending on the type of beverage, including the fruity notes of wine, the malty scent of beer, and the complex bouquet of spirits. They are commonly enjoyed in social and recreational settings. |
| 13 | Amines | C | Amines are organic compounds with various odors, often described as fishy, ammonia-like, or pungent. They can be found in nature, such as in fish, and are also used in various industrial applications, including the production of pharmaceuticals and dyes. |
| 14 | Ammonia | C | Ammonia is a pungent, sharp odor, and can be a colorless gas or liquid. It is widely used in industrial cleaning agents and as a refrigerant. The smell of ammonia is often associated with household cleaning products and can be detected in facilities where it is used. |
| 15 | Amyl acetate | A | Amyl acetate has a sweet, fruity odor and is used in flavorings and perfumes. It is commonly found in fruit-flavored products, including candy, confectionery, and scented personal care items. |
| 16 | Amyl alcohol | A | Amyl alcohol refers to various isomers with distinct odors, including a sweet, floral scent. These compounds are used in the fragrance industry and can be found in perfumes, cosmetics, and scented products. |
| 17 | Amyl ether | A | Amyl ethers are compounds with sweet, fruity, or floral odors. They are used as solvents in various applications, including the manufacture of fragrances, perfumes, and scented products. The pleasant aroma of amyl ethers can be found in scented items and cosmetics. |
| 18 | Anesthetics | B | Anesthetics are substances used in medical practice to induce loss of sensation or consciousness. They may have various odors, depending on the specific anesthetic agent used. The characteristic smells of anesthetics are encountered in healthcare settings and operating rooms. |
| 19 | Aniline | A | Aniline is a colorless to brownish liquid with an aromatic odor. It is used in the production of dyes, chemicals, and pharmaceuticals. The distinctive aroma of aniline can be experienced in facilities involved in these industries. |
| 20 | Animal odors | B | Animal odors encompass a range of scents associated with various animals, including pets, livestock, and wildlife. These odors are commonly found in rural areas, farms, zoos, and areas with animal populations. They can vary in intensity and character based on the animal species. |
| 21 | Antiseptics | A | Antiseptics are substances used for disinfection and sanitation. They come in various forms, such as liquids, wipes, or sprays, and may have different scents depending on their ingredients. Antiseptic odors are prevalent in healthcare settings, first-aid kits, and during personal hygiene routines. |
| 22 | Asphalt fumes | A | Asphalt fumes are odors related to the heating or use of asphalt in road construction and roofing. The distinct smell of asphalt fumes is encountered in construction sites and urban areas where road maintenance and construction are taking place. |
| 23 | Automobile exhaust | B | Automobile exhaust refers to the emissions from vehicle engines, which contain a mixture of gases and particulates. These emissions produce various odors, including the pungent smell of burnt gasoline and diesel fuel. Automobile exhaust odors are commonly found in urban and suburban areas with heavy traffic. |
| 24 | Bacteria | B | Bacteria produce various odors associated with their metabolic activities. These odors can range from musty to putrid and are commonly encountered in environments where bacterial growth is present, such as spoiled food, stagnant water, and certain medical conditions. |
| 25 | Bathroom smells | A | Bathroom smells encompass various odors commonly found in bathrooms, including those from soap, cleaning products, and personal hygiene. The combination of these scents gives bathrooms their distinct aroma, which is prevalent in homes and public restrooms. |
| 26 | Benzene | A | Benzene is a colorless liquid with a sweet, aromatic odor. It is used as a precursor in the production of plastics, synthetic rubber, and various chemicals. The characteristic scent of benzene can be experienced in industrial facilities where it is utilized. |
| 27 | Bleaching solutions | B | Bleaching solutions are chemical substances used to remove or lighten color, often found in laundry and cleaning applications. |
| 28 | Body odors | A | Body odors are the natural scents produced by the human body, influenced by various factors like diet, hygiene, and individual biology. |
| 29 | Bromine | A | Bromine is a reddish-brown liquid with a pungent, unpleasant odor. It is a halogen element used in various industrial applications, including flame retardants and drilling fluids. |
| 30 | Burned fat | A | The smell of burned fat can result from cooking or industrial processes and is associated with the burning of fatty substances. |
| 31 | Burned flesh | A | The odor of burned flesh is a pungent, acrid smell that arises from the charring or incineration of animal or human tissue. |
| 32 | Burned food | A | Burned food produces a distinctive, unpleasant smell when cooking goes awry, resulting from overheating and scorching ingredients. |
| 33 | Butadiene | B | Butadiene is a chemical compound used in the production of synthetic rubber and various plastics. It has a sweet, gasoline-like odor. |
| 34 | Butane | C | Butane is a colorless gas commonly used as a fuel in lighters and portable stoves. It has a faint, gasoline-like odor. |
| 35 | Butanone | C | Butanone, also known as methyl ethyl ketone, is a solvent with a sweet, acetone-like odor. It is used in various industrial and manufacturing processes. |
| 36 | Butyl acetate | A | Butyl acetate is a chemical compound with a fruity, sweet odor. It is commonly used as a solvent and in the production of various products. |
| 37 | Butyl alcohol | A | Butyl alcohol, also known as butanol, has a strong, alcoholic odor. It is used as a solvent and in manufacturing processes. |
| 38 | Butyl cellosolve | A | Butyl cellosolve, or ethylene glycol butyl ether, has a mild, sweet odor and is often used as a solvent in various applications. |
| 39 | Butyl chloride | A | Butyl chloride is a chemical compound with a pungent, chloroform-like odor. It is used in chemical synthesis and as a solvent. |
| 40 | Butyl ether | A | Butyl ether is a chemical compound with a faint, sweet odor. It is used as a solvent and in various industrial processes. |
| 41 | Butylene | C | Butylene is a group of chemical compounds, and its odor can vary depending on the specific isomer and concentration. |
| 42 | Butyne | C | Butyne is a chemical compound with a gasoline-like odor. It is used in various industrial applications. |
| 43 | Butyraldehyde | B | Butyraldehyde is a chemical compound used in the production of various chemicals and can have a fruity or nutty odor. |
| 44 | Butyric acid | A | Butyric acid has a rancid, pungent odor and is found in some dairy products. It is also used in the production of various chemicals. |
| 45 | Camphor | A | Camphor is a white, crystalline substance with a strong, medicinal odor. It is often used in medicinal and aromatic applications. |
| 46 | Cancer odor | A | The term "cancer odor" is not specific; cancers themselves typically do not have a characteristic odor. |
| 47 | Caprylic acid | A | Caprylic acid is a natural fatty acid with a variety of applications and a faint, sweet odor that can be found in some food products. |
| 48 | Carbolic acid | A | Carbolic acid, also known as phenol, has a distinctive, medicinal odor. It is used in a variety of industrial and medical applications. |
| 49 | Carbon bisulfide | C | Carbon bisulfide is a colorless volatile liquid with a sweet, ether-like odor. It is used in industrial processes and as a solvent. |
| 50 | Carbon dioxide | D | Carbon dioxide is a colorless and odorless gas produced during respiration and combustion. It does not have a distinct odor. |
| 51 | Carbon monoxide | D | Carbon monoxide is a colorless, odorless gas that can be produced during incomplete combustion. It is toxic and lacks a noticeable odor. |
| 52 | Carbon tetrachloride | A | Carbon tetrachloride is a colorless liquid with a sweet, chloroform-like odor. It has been used in various industrial applications. |
| 53 | Cellosolve | A | Cellosolve, or ethylene glycol ethyl ether, has a mild, sweet odor and is commonly used as a solvent in industrial and household products. |
| 54 | Cellosolve acetate | A | Cellosolve acetate is a chemical compound with a fruity, sweet odor and is often used as a solvent in various applications. |
| 55 | Charred materials | A | The smell of charred materials, such as wood or fabric, results from combustion or exposure to high heat, often used in barbecue cooking. |
| 56 | Cheese | A | The scent of cheese varies depending on the type, but it can have a pungent, fermented aroma, ranging from mild to strong, depending on the variety. |
| 57 | Chemicals | B | The category of "chemicals" encompasses various chemical substances, each with its own unique odor and properties. |
| 58 | Chlorine | C | Chlorine is a greenish-yellow gas with a sharp, pungent odor. It is commonly used in water treatment and as a disinfectant. |
| 59 | Chlorobenzene | A | Chlorobenzene is a chemical compound used in various applications, and its odor depends on its specific form. |
| 60 | Chlorobutadiene | A | Chlorobutadiene is a chemical compound with various uses and an odor that can vary depending on its isomer and concentration. |
| 61 | Chloroform | A | Chloroform is a chemical compound used in the past as an anesthetic; it has a sweet odor and has been associated with health risks. |
| 62 | Chloronitropropane | A | Chloronitropropane is a chemical compound with industrial uses; its odor and environmental effects can vary depending on the isomer. |
| 63 | Chloropicrin | A | Chloropicrin is a chemical compound used in fumigation; it has a pungent, choking odor and can cause respiratory irritation. |
| 64 | Cigarette smoke | A | Cigarette smoke is the odor from burning tobacco and is a common component of indoor air pollution, known for its distinct smell. |
| 65 | Citrus and other fruits | A | Citrus and other fruits emit a pleasant, fruity aroma. Oranges, lemons, and other citrus fruits, as well as various other fruits, produce scents commonly found in grocery stores, kitchens, and orchards. |
| 66 | Cleaning compounds | A | Cleaning compounds encompass a variety of products, including detergents, disinfectants, and cleaning agents. These products may have different scents based on their ingredients and intended use. Cleaning compound odors are prevalent in households, offices, and industrial settings. |
| 67 | Coal smoke | B | Coal smoke is the byproduct of burning coal and has a distinct, smoky odor. It is associated with coal-burning power plants, locomotives, and other industrial facilities using coal as a fuel source. |
| 68 | Combustion odors | B | Combustion odors are produced during the burning of various fuels, including wood, gasoline, and natural gas. These odors can vary depending on the type of fuel and combustion process and are commonly encountered near sources of combustion, such as fireplaces and engines. |
| 69 | Cooking odors | A | Cooking odors encompass a wide range of scents produced during food preparation, from the aroma of freshly baked bread to the savory smell of sautéing garlic. These odors are commonly found in kitchens and dining areas. |
| 70 | Corrosive gases | C | Corrosive gases are compounds that can corrode or degrade other materials. They can have various odors depending on the specific corrosive gas in question. These odors may be found in industrial and laboratory settings. |
| 71 | Creosote | A | Creosote is a dark, oily liquid with a strong, smoky odor. It is used as a wood preservative and is commonly associated with the smell of treated wood, particularly in outdoor settings, such as decks and fences. |
| 72 | Cresols | A | Cresols are organic compounds with a medicinal or phenolic odor. They are used in the production of disinfectants and industrial applications. The characteristic smell of cresols can be detected in healthcare settings and areas where disinfectants are used. |
| 73 | Crotonaldehyde | A | Crotonaldehyde is a liquid with a pungent, acrid odor. It is used in the manufacture of chemicals and plastics. The smell of crotonaldehyde can be found in industrial and chemical processing facilities. |
| 74 | Cyclohexane | A | Cyclohexane is a colorless liquid with a sweet, gasoline-like odor. It is used as a solvent in various industrial processes and the manufacture of chemicals. The odor of cyclohexane can be encountered in manufacturing and industrial settings. |
| 75 | Cyclohexanol | A | Cyclohexanol is a liquid with a sweet, floral odor. It is used in the production of fragrances, perfumes, and as a solvent. The pleasant aroma of cyclohexanol can be found in scented items and cosmetics. |
| 76 | Cyclohexanone | A | Cyclohexanone is a colorless liquid with a sweet, peppermint-like odor. It is used as a solvent and in the production of plastics and synthetic resins. The odor of cyclohexanone can be detected in industrial and manufacturing settings. |
| 77 | Cyclohexene | A | Cyclohexene is a colorless liquid with a sweet, gasoline-like odor. It is used in the manufacture of chemicals and plastics. The smell of cyclohexene can be found in industrial and chemical processing facilities. |
| 78 | Dead animals | A | The smell of dead animals is the result of decomposition. It can vary widely depending on the type of animal and stage of decay. These odors are commonly encountered in outdoor and natural settings, as well as in areas with pest problems. |
| 79 | Decane | A | Decane is a colorless liquid with a faint gasoline-like odor. It is used as a solvent in various industrial processes. The odor of decane can be present in manufacturing and chemical facilities. |
| 80 | Decaying substances | A | Decaying substances produce a characteristic, unpleasant odor as organic matter decomposes. These odors can be found in nature, garbage dumps, and other locations where organic material breaks down. |
| 81 | Decomposition odors | A | Decomposition odors result from the breakdown of organic matter, such as plants and animals. These odors are often pungent and unpleasant and are encountered in natural environments and situations involving decay. |
| 82 | Deodorants | A | Deodorants are personal care products designed to mask or reduce body odor. They come in various scents and forms, from sprays to sticks. Deodorant odors are commonly found in bathrooms and personal grooming areas. |
| 83 | Detergents | A | Detergents are cleaning products used to remove dirt and stains from fabrics and surfaces. They can have different scents based on their formulations. Detergent odors are prevalent in households and laundries. |
| 84 | Dibromoethane | A | Dibromoethane is a colorless liquid with a sweet, chloroform-like odor. It was historically used as an anti-knock agent in leaded gasoline. The distinctive smell of dibromoethane can be found near old gasoline storage facilities and engines. |
| 85 | Dichlorobenzene | A | Dichlorobenzene is a colorless liquid with a sweet, aromatic odor. It is used in the production of chemicals, plastics, and as a pesticide. The characteristic scent of dichlorobenzene can be encountered in industrial and manufacturing settings. |
| 86 | Dichlorodifluoromethane | B | Dichlorodifluoromethane is a colorless gas with a faint, ethereal odor. It was once used as a refrigerant and propellant in aerosol sprays. The odor of dichlorodifluoromethane can be found in older refrigeration systems and appliances. |
| 87 | Dichloroethane | A | Dichloroethane is a colorless liquid with a sweet, chloroform-like odor. It is used as a solvent and in the manufacture of chemicals and plastics. The smell of dichloroethane can be encountered in industrial and chemical processing facilities. |
| 88 | Dichloroethyl ether | A | Dichloroethyl ether is a colorless liquid with a sweet, chloroform-like odor. It is used in the production of chemicals and as a solvent. The odor of dichloroethyl ether can be detected in industrial and manufacturing settings. |
| 89 | Dichloroethylene | A | Dichloroethylene is a colorless gas with a faint, sweet odor. It is used as a refrigerant and in the manufacture of chemicals and plastics. The odor of dichloroethylene can be found in industrial and manufacturing settings. |
| 90 | Dichloromonofluoromethane | A | Dichloromonofluoromethane is a colorless gas with a faint, ethereal odor. It was used as a refrigerant and propellant in aerosol sprays. The odor of dichloromonofluoromethane can be found in older refrigeration systems and appliances. |
| 91 | Dichloronitroethane | A | Dichloronitroethane is a chemical used in explosives and can have a sharp, irritating odor, especially in high concentrations. |
| 92 | Dichloropropane | A | Dichloropropane is a chemical compound with various uses and a potentially unpleasant odor, depending on the isomer and concentration. |
| 93 | Dichlorotetrafluoroethane | B | Dichlorotetrafluoroethane is a refrigerant with a faint, sweet odor; it has ozone-depleting properties and is regulated for its use. |
| 94 | Diesel fumes | B | Diesel fumes have a distinctive, pungent odor that is produced by the combustion of diesel fuel in engines. This odor is commonly encountered in areas with diesel-powered vehicles and machinery. |
| 95 | Diethylamine | B | Diethylamine is a colorless gas with an ammonia-like odor. It is used in various industrial processes, including the production of rubber and pharmaceuticals. The odor of diethylamine can be detected in manufacturing and chemical facilities. |
| 96 | Diethylketone | A | Diethylketone, also known as 3-pentanone, is a colorless liquid with a sweet, fruity odor. It is used as a solvent and in the production of artificial flavors. The pleasant aroma of diethylketone can be found in scented products and flavorings. |
| 97 | Dimethylaniline | A | Dimethylaniline is a colorless to yellowish liquid with a fishy or aniline-like odor. It is used in the production of dyes and pharmaceuticals. The distinctive smell of dimethylaniline can be encountered in industrial and chemical manufacturing settings. |
| 98 | Dimethylsulfate | A | Dimethylsulfate is a colorless liquid with a sweet, fruity odor. It is used in the production of chemicals and as a methylating agent. The odor of dimethylsulfate can be detected in industrial and chemical processing facilities. |
| 99 | Dioxane | A | Dioxane is a colorless liquid with a faint, sweet odor. It is used as a solvent in various industrial processes and as a stabilizer in chlorinated solvents. The odor of dioxane can be found in manufacturing and chemical facilities. |
| 100 | Dipropylketone | A | Dipropylketone is a colorless liquid with a sweet, peppermint-like odor. It is used as a solvent and in the production of artificial flavors. The pleasant aroma of dipropylketone can be found in scented products and flavorings. |
| 101 | Dish odors | A | Dish odors refer to the scents produced during and after washing dishes. They may include the smells of food residues, dish soap, and detergents, commonly found in kitchens and dishwashing areas. |
| 102 | Disinfectants | A | Disinfectants are chemical agents designed to kill or inhibit the growth of microorganisms. They come in various scents, and the odor of disinfectants is commonly found in healthcare settings, bathrooms, and areas where cleanliness is a priority. |
| 103 | Embalming odors | A | Embalming odors refer to the distinctive smells associated with the embalming process used in mortuaries and funeral homes. These odors are often a mixture of chemicals used to preserve and prepare the deceased for viewing. |
| 104 | Essential oils | A | Essential oils are highly concentrated plant extracts, each with its own characteristic aroma. They are commonly used in aromatherapy, perfumery, and for their various therapeutic properties. The scents of essential oils can be found in products such as perfumes and natural remedies. |
| 105 | Ethane | D | Ethane is a colorless and odorless gas. It is a hydrocarbon and is commonly found in natural gas. Ethane itself does not have a distinct odor, but odorants are often added to natural gas for safety reasons to detect gas leaks. |
| 106 | Ether | B | Ether is a colorless liquid with a sweet, pungent odor. It is used as a solvent and anesthetic agent. The distinctive smell of ether can be found in older medical and laboratory settings. |
| 107 | Ethyl acetate | A | Ethyl acetate is a colorless liquid with a sweet, fruity odor. It is commonly used as a solvent in various industrial applications and as a flavoring agent. The pleasant aroma of ethyl acetate can be found in scented products and flavorings. |
| 108 | Ethyl acrylate | A | Ethyl acrylate is a colorless liquid with a pungent, acrid odor. It is used in the production of plastics, adhesives, and coatings. The smell of ethyl acrylate can be detected in industrial and manufacturing settings. |
| 109 | Ethyl alcohol | A | Ethyl alcohol, or ethanol, is a colorless liquid with a characteristic alcoholic or "drinking alcohol" odor. It is used in alcoholic beverages, as a solvent, and in the production of various products. The scent of ethyl alcohol can be found in alcoholic drinks and scented products. |
| 110 | Ethyl benzene | A | Ethyl benzene is a colorless liquid with a sweet, gasoline-like odor. It is used as a solvent and in the production of plastics and chemicals. The odor of ethyl benzene can be encountered in manufacturing and industrial settings. |
| 111 | Ethyl bromide | B | Ethyl bromide is a colorless gas with a sweet, chloroform-like odor. It is used in the production of chemicals, pharmaceuticals, and as a refrigerant. The smell of ethyl bromide can be detected in industrial and manufacturing settings. |
| 112 | Ethyl chloride | B | Ethyl chloride is a colorless gas with a sweet, chloroform-like odor. It is used in various industrial processes, including the production of chemicals and as a refrigerant. The odor of ethyl chloride can be found in manufacturing and chemical facilities. |
| 113 | Ethyl ether | B | Ethyl ether is a colorless liquid with a sweet, ether-like odor. It was historically used as an anesthetic and solvent. The distinctive smell of ethyl ether can be found in older medical and laboratory settings. |
| 114 | Ethyl formate | B | Ethyl formate is a colorless liquid with a sweet, fruity odor. It is used in the production of artificial flavors and as a solvent. The pleasant aroma of ethyl formate can be found in scented products and flavorings. |
| 115 | Ethyl mercaptan | A | Ethyl mercaptan is a colorless gas with a strong, foul, and garlic-like odor. It is commonly added to natural gas to give it a distinct odor for safety reasons. The pungent smell of ethyl mercaptan can be encountered near gas leaks. |
| 116 | Ethyl silicate | A | Ethyl silicate is a colorless liquid with a pungent, acrid odor. It is used in the production of ceramics, coatings, and as a binding agent. The odor of ethyl silicate can be detected in industrial and manufacturing settings. |
| 117 | Ethylamine | B | Ethylamine is a colorless gas with an ammonia-like odor. It is used in the production of chemicals and pharmaceuticals. The odor of ethylamine can be detected in manufacturing and chemical facilities. |
| 118 | Ethylene | D | Ethylene is a colorless and odorless gas. It is a hydrocarbon and is commonly found in natural gas. Ethylene itself does not have a distinct odor, but odorants are often added to natural gas for safety reasons to detect gas leaks. |
| 119 | Ethylene chlorhydrin | A | Ethylene chlorhydrin is a colorless liquid with a sweet, chloroform-like odor. It is used in the production of chemicals and as a solvent. The smell of ethylene chlorhydrin can be found in industrial and manufacturing settings. |
| 120 | Ethylene dichloride | A | Ethylene dichloride is a colorless liquid with a sweet, chloroform-like odor. It is used in the production of chemicals, plastics, and as a lead scavenger in gasoline. The odor of ethylene dichloride can be encountered in industrial and manufacturing settings. |
| 121 | Ethylene oxide | B | Ethylene oxide is a colorless gas with a sweet, ether-like odor. It is used as a sterilizing agent and in the production of chemicals. The odor of ethylene oxide can be found in healthcare and industrial settings. |
| 122 | Eucalyptole | A | Eucalyptole, also known as 1,8-cineole, is a colorless liquid with a fresh, minty aroma. It is found in eucalyptus oil and used in medicinal and therapeutic products. The distinctive scent of eucalyptole can be encountered in products like cough drops and vapor rubs. |
| 123 | Exhaust fumes | B | Exhaust fumes are the result of combustion in internal combustion engines. They can have various odors depending on the type of fuel and engine conditions. Exhaust fumes are commonly encountered near vehicles and industrial equipment. |
| 124 | Female odors | A | Female odors refer to the natural scents produced by the female human body. These scents can vary depending on factors like hygiene and personal care products and are typically found in personal and intimate settings. |
| 125 | Fertilizer | A | Fertilizer odors can vary depending on the type of fertilizer used. They may have a pungent or earthy scent and are commonly found in agricultural areas and gardens where fertilizers are applied. |
| 126 | Film processing odors | B | Film processing odors encompass the scents associated with developing photographic film. These odors can vary depending on the chemicals and processes used and are typically found in photography studios and darkrooms. |
| 127 | Floral scents | A | Floral scents are the pleasant aromas produced by various flowers. They are often used in perfumes, air fresheners, and scented products. The delightful scents of flowers can be encountered in gardens, floral shops, and perfumes. |
| 128 | Fluorotrichloromethane | B | Fluorotrichloromethane is a colorless gas with a faint, ethereal odor. It was used as a refrigerant and propellant in aerosol sprays. The odor of fluorotrichloromethane can be found in older refrigeration systems and appliances. |
| 129 | Food aromas | A | Food aromas encompass a wide range of scents produced during cooking and baking. They include the delightful smells of freshly prepared meals and baked goods, commonly found in kitchens and dining areas. |
| 130 | Formaldehyde | C | Formaldehyde is a colorless gas with a pungent, suffocating odor. It is used in various industrial applications, including the production of resins and adhesives. The distinctive smell of formaldehyde can be encountered in manufacturing and laboratory settings. |
| 131 | Formic acid | B | Formic acid is a colorless liquid with a pungent, acrid odor. It is found in the venom of some ants and is used in various industrial processes. The odor of formic acid can be detected in manufacturing and chemical facilities. |
| 132 | Fuel gases | C | Fuel gases encompass a range of gases used as fuel sources, such as natural gas and propane. They can have different odors based on additives added for safety reasons. Fuel gas odors are commonly found in homes, industrial facilities, and near gas utilities. |
| 133 | Fumes | B | Fumes refer to the airborne particles and vapors produced during various industrial processes, including welding, chemical reactions, and combustion. The odor of fumes can vary depending on the specific process and materials involved, and they are commonly encountered in manufacturing and industrial settings. |
| 134 | Gangrene | A | Gangrene is a condition in which body tissues die due to a lack of blood supply. It produces a foul, putrid odor that is commonly found in medical and healthcare settings when treating severe wounds and infections. |
| 135 | Garlic | A | Garlic is a popular culinary ingredient with a pungent, distinctive aroma. It is commonly used in cooking and can be encountered in kitchens and dishes prepared with garlic. |
| 136 | Gasoline | A | Gasoline is a volatile, flammable liquid with a sweet, gasoline-like odor. It is used as fuel for internal combustion engines. The characteristic smell of gasoline is commonly found at gas stations and near vehicles. |
| 137 | Heptane | A | Heptane is a colorless liquid with a faint gasoline-like odor. It is used as a solvent in various industrial processes. The odor of heptane can be present in manufacturing and chemical facilities. |
| 138 | Heptene | A | Heptene is a colorless liquid with a sweet, fruity odor. It is used in the production of chemicals and plastics. The pleasant aroma of heptene can be found in scented products and industrial settings. |
| 139 | Hexane | B | Hexane is a colorless liquid with a faint gasoline-like odor. It is used as a solvent in various industrial processes. The odor of hexane can be encountered in manufacturing and chemical facilities. |
| 140 | Hexenes | B | Hexenes are a group of hydrocarbons with a sweet, gasoline-like odor. They are used in the production of chemicals and plastics. The smell of hexenes can be found in industrial and chemical manufacturing settings. |
| 141 | Hexynes | B | Hexynes are a group of hydrocarbons with a sweet, gasoline-like odor. They are used in the production of chemicals and plastics. The odor of hexynes can be detected in industrial and manufacturing settings. |
| 142 | Hospital odors | A | Hospital odors refer to the scents commonly found in healthcare settings, including the smell of disinfectants, medications, and medical equipment. These odors can vary depending on the specific area within a hospital. |
| 143 | Household smells | A | Household smells encompass a wide range of scents commonly found in homes, including the odors of cooking, cleaning products, and personal care items. These scents can vary based on individual preferences and habits. |
| 144 | Hydrogen | D | Hydrogen is a colorless and odorless gas. It is one of the most abundant elements in the universe and is commonly found in various industrial applications. Hydrogen itself does not have a distinct odor, but odorants are sometimes added for safety reasons. |
| 145 | Hydrogen bromide | C | Hydrogen bromide is a colorless gas with a sharp, pungent odor. It is used in various industrial processes, including the production of chemicals and pharmaceuticals. The odor of hydrogen bromide can be detected in manufacturing and chemical facilities. |
| 146 | Hydrogen chloride | C | Hydrogen chloride is a colorless gas with a sharp, pungent odor. It is used in various industrial processes, including chemical manufacturing. The odor of hydrogen chloride can be detected in manufacturing and chemical facilities. |
| 147 | Hydrogen cyanide | C | Hydrogen cyanide is a colorless gas with a faint, bitter almond-like odor. It is used in various industrial applications, including the production of chemicals. The odor of hydrogen cyanide can be found in manufacturing and chemical facilities. |
| 148 | Hydrogen fluoride | C | Hydrogen fluoride is a colorless gas with a pungent, acrid odor. It is used in various industrial processes, including the production of aluminum and electronics. The odor of hydrogen fluoride can be encountered in manufacturing and industrial settings. |
| 149 | Hydrogen iodide | C | Hydrogen iodide is a colorless gas with a sharp, pungent odor. It is used in chemical manufacturing and pharmaceutical applications. The odor of hydrogen iodide can be detected in industrial and chemical facilities. |
| 150 | Hydrogen selenide | C | Hydrogen selenide is a colorless gas with a foul, rotten egg-like odor. It is used in various industrial processes, including the production of semiconductors. The distinctive smell of hydrogen selenide can be found in manufacturing and industrial settings. |
| 151 | Hydrogen sulfide | C | Hydrogen sulfide is a colorless gas with a strong, rotten egg-like odor. It is produced by the decomposition of organic matter and is commonly found in sewage, swamps, and industrial settings. |
| 152 | Incense | A | Incense is a substance that is burned to produce a fragrant aroma. It is commonly used in religious and spiritual ceremonies, as well as for meditation and relaxation. The scent of incense varies depending on the type and ingredients used. |
| 153 | Incomplete combustion | B | Incomplete combustion refers to the process in which a fuel does not burn completely, resulting in the production of various pollutants and odors. These odors can include the smell of unburned fuel and are commonly found in the vicinity of combustion sources. |
| 154 | Indole | A | Indole is a white crystalline compound with a strong, fecal-like odor. It is found in feces and is used in the production of perfumes and fragrances. The odor of indole can be encountered in some natural and synthetic scents. |
| 155 | Industrial wastes | B | Industrial wastes encompass a wide range of byproducts and residues generated by industrial processes. These wastes can produce various odors depending on their composition and are commonly found near industrial facilities and waste disposal sites. |
| 156 | Inorganic chemicals | B | Inorganic chemicals are compounds that do not contain carbon-hydrogen (C-H) bonds. They are used in various industrial applications, including manufacturing and chemical processes. The odors of inorganic chemicals can vary depending on the specific compound. |
| 157 | Iodine | A | Iodine is a purple-black solid with a pungent, sharp odor. It is used in various applications, including disinfectants and pharmaceuticals. The smell of iodine can be detected in healthcare and laboratory settings. |
| 158 | Iodoform | A | Iodoform is a yellow crystalline solid with a sweet, moldy odor. It is used in the medical field as an antiseptic and in the production of chemicals. The distinctive scent of iodoform can be found in healthcare and pharmaceutical settings. |
| 159 | Irritants | A | Irritants are substances that can cause irritation to the eyes, nose, or throat. They include various chemicals and particulate matter and are commonly encountered in environments with poor air quality or exposure to pollutants. |
| 160 | Isophorone | A | Isophorone is a colorless liquid with a sweet, peppermint-like odor. It is used in the production of resins, coatings, and adhesives. The pleasant aroma of isophorone can be found in scented products and industrial settings. |
| 161 | Isoprene | B | Isoprene is a colorless gas with a sweet, gasoline-like odor. It is released by natural sources like plants and is used in the production of synthetic rubber. The smell of isoprene can be encountered in industrial and manufacturing settings. |
| 162 | Isopropyl acetate | A | Isopropyl acetate is a colorless liquid with a sweet, fruity odor. It is used as a solvent and in the production of artificial flavors. The pleasant aroma of isopropyl acetate can be found in scented products and flavorings. |
| 163 | Isopropyl alcohol | A | Isopropyl alcohol is a colorless liquid with a characteristic alcoholic or rubbing alcohol odor. It is commonly used as a disinfectant and in the production of various products. The scent of isopropyl alcohol is commonly found in healthcare and cleaning products. |
| 164 | Isopropyl ether | A | Isopropyl ether is a colorless liquid with a sweet, ether-like odor. It is used as a solvent and in the production of chemicals. The distinctive smell of isopropyl ether can be found in industrial and manufacturing settings. |
| 165 | Kerosene | A | Kerosene is a flammable, oily liquid with a characteristic kerosene or jet fuel odor. It is used as fuel for lamps, heaters, and jet engines. The smell of kerosene is commonly found in areas where kerosene products are used. |
| 166 | Kitchen odors | A | Kitchen odors refer to the scents produced during cooking and food preparation. They may include the smells of various cuisines and ingredients and are commonly found in kitchens and dining areas. |
| 167 | Lactic acid | A | Lactic acid is a colorless liquid with a sour, acidic odor. It is found in sour milk and is used in various industrial processes, including food production. The odor of lactic acid can be detected in dairy and food processing facilities. |
| 168 | Lingering odors | A | Lingering odors refer to persistent and long-lasting scents that may accumulate over time. They can vary widely in origin, from cooking and cleaning to personal care products, and are commonly found in indoor spaces with poor ventilation. |
| 169 | Liquid fuels | A | Liquid fuels encompass a range of flammable liquids used as energy sources, including gasoline, diesel, and kerosene. These fuels have distinct odors and are commonly found at gas stations and in areas where they are stored or used. |
| 170 | Liquor odors | A | Liquor odors refer to the distinctive scents produced by alcoholic beverages such as whiskey, vodka, and rum. The aromas of various liquors can vary widely and are commonly encountered in bars and liquor stores. |
| 171 | Lubricating oils and greases | A | Lubricating oils and greases are substances used to reduce friction between moving parts. They can have a range of scents, from mild to pungent, and are commonly found in mechanical and industrial settings. |
| 172 | Masking agents | A | Masking agents are substances used to conceal or modify odors. They are often found in air fresheners, perfumes, and deodorants and are designed to provide a more pleasant scent to mask less desirable odors. |
| 173 | Medicinal odors | A | Medicinal odors refer to the scents associated with pharmaceutical products and healthcare settings. These odors can vary widely, depending on the type of medication or treatment being used. |
| 174 | Melons | A | Melons, such as cantaloupe and honeydew, have a sweet, fruity aroma. They are commonly enjoyed as fresh fruits and are encountered in kitchens, fruit markets, and dishes prepared with melons. |
| 175 | Menthol | A | Menthol is a white crystalline compound with a minty, cooling odor. It is commonly found in various products, including throat lozenges, cough drops, and topical analgesics. The refreshing scent of menthol is often used for its soothing properties. |
| 176 | Mercaptans | A | Mercaptans are a group of sulfur compounds with foul, skunk-like odors. They are commonly added to natural gas to give it a distinct odor for safety reasons. The pungent smell of mercaptans can be encountered near gas leaks. |
| 177 | Mesityl oxide | A | Mesityl oxide is a colorless liquid with a sweet, fruity odor. It is used in the production of artificial flavors and fragrances. The pleasant aroma of mesityl oxide can be found in scented products and flavorings. |
| 178 | Methane | D | Methane is a colorless and odorless gas. It is the primary component of natural gas. Methane itself does not have a distinct odor, but odorants are often added to natural gas for safety reasons to detect gas leaks. |
| 179 | Methyl acetate | B | Methyl acetate is a colorless liquid with a sweet, fruity odor. It is used as a solvent in various industrial applications and as a flavoring agent. The pleasant aroma of methyl acetate can be found in scented products and flavorings. |
| 180 | Methyl acrylate | A | Methyl acrylate is a colorless liquid with a pungent, acrid odor. It is used in the production of adhesives, coatings, and plastics. The smell of methyl acrylate can be detected in industrial and manufacturing settings. |
| 181 | Methyl alcohol | B | Methyl alcohol, or methanol, is a colorless liquid with a pungent, alcoholic odor. It is used in various industrial applications, including as a solvent and fuel. The odor of methyl alcohol can be found in manufacturing and chemical facilities. |
| 182 | Methyl bromide | B | Methyl bromide is a colorless gas with a sweet, chloroform-like odor. It was used as a fumigant in agriculture and pest control. The smell of methyl bromide can be detected in agricultural and industrial settings. |
| 183 | Methyl butyl ketone | A | Methyl butyl ketone, also known as 2-hexanone, is a colorless liquid with a sweet, fruity odor. It is used as a solvent and in the production of artificial flavors. The pleasant aroma of methyl butyl ketone can be found in scented products and flavorings. |
| 184 | Methyl cellosolve | A | Methyl cellosolve, also known as 2-methoxyethanol, is a colorless liquid with a mild, sweet odor. It is used as a solvent and in the production of cleaning products. The scent of methyl cellosolve can be encountered in cleaning solutions and industrial settings. |
| 185 | Methyl cellosolve acetate | A | Methyl cellosolve acetate is a colorless liquid with a mild, sweet odor. It is used as a solvent in various industrial applications and as a coating agent. The pleasant aroma of methyl cellosolve acetate can be found in scented products and coatings. |
| 186 | Methyl chloride | C | Methyl chloride is a colorless gas with a sweet, chloroform-like odor. It is used in various industrial processes, including the production of chemicals and pharmaceuticals. The odor of methyl chloride can be detected in manufacturing and chemical facilities. |
| 187 | Methyl chloroform | A | Methyl chloroform is a colorless liquid with a sweet, chloroform-like odor. It was used as a solvent and cleaning agent. The smell of methyl chloroform can be found in older cleaning products and industrial settings. |
| 188 | Methyl ether | B | Methyl ether is a colorless gas with a sweet, ether-like odor. It is used in various industrial applications, including as a refrigerant and as a propellant. The distinctive smell of methyl ether can be encountered in manufacturing and chemical facilities. |
| 189 | Methyl ethyl ketone | A | Methyl ethyl ketone, also known as MEK, is a colorless liquid with a sweet, minty odor. It is used as a solvent and in the production of adhesives and coatings. The pleasant aroma of methyl ethyl ketone can be found in scented products and industrial settings. |
| 190 | Methyl formate | B | Methyl formate is a colorless liquid with a sweet, fruity odor. It is used in the production of chemicals and as a flavoring agent. The pleasant aroma of methyl formate can be found in scented products and flavorings. |
| 191 | Methyl isobutyl ketone | A | Methyl isobutyl ketone, also known as MIBK, is a colorless liquid with a sweet, minty odor. It is used as a solvent and in the production of coatings and adhesives. The pleasant aroma of methyl isobutyl ketone can be encountered in scented products and industrial settings. |
| 192 | Methyl mercaptan | A | Methyl mercaptan is a sulfur compound with a foul, skunk-like odor. It is commonly added to natural gas to give it a distinct odor for safety reasons. The pungent smell of methyl mercaptan can be encountered near gas leaks. |
| 193 | Methylal | B | Methylal is a colorless liquid with a sweet, fruity odor. It is used as a solvent in various industrial applications and as a flavoring agent. The pleasant aroma of methylal can be found in scented products and flavorings. |
| 194 | Methylcyclohexane | A | Methylcyclohexane is a colorless liquid with a faint gasoline-like odor. It is used as a solvent and in the production of chemicals. The odor of methylcyclohexane can be detected in manufacturing and chemical facilities. |
| 195 | Methylcyclohexanol | A | Methylcyclohexanol is a colorless liquid with a faint gasoline-like odor. It is used in the production of chemicals and plastics. The smell of methylcyclohexanol can be found in industrial and chemical manufacturing settings. |
| 196 | Methylcyclohexanone | A | Methylcyclohexanone is a colorless liquid with a faint gasoline-like odor. It is used in the production of chemicals and plastics. The odor of methylcyclohexanone can be encountered in industrial and chemical manufacturing settings. |
| 197 | Methylene chloride | A | Methylene chloride is a colorless liquid with a sweet, chloroform-like odor. It is used as a solvent and in paint stripping and degreasing. The smell of methylene chloride can be found in industrial and construction settings. |
| 198 | Mildew | B | Mildew is a type of fungus that can grow on damp surfaces, producing a musty and earthy odor. It is commonly found in areas with high humidity, such as basements and bathrooms, and on surfaces with organic materials. |
| 199 | Mixed odors | A | Mixed odors refer to a combination of various scents present in the environment. They can result from multiple sources, such as cooking, cleaning, and personal care products, and are commonly found in indoor spaces with a mix of activities. |
| 200 | Mold | B | Mold is a type of fungus that can grow on damp surfaces, producing a musty and earthy odor. It is commonly found in areas with high humidity, such as basements, attics, and areas with water damage. |
| 201 | Monochlorobenzene | A | Monochlorobenzene is a colorless liquid with a sweet, benzene-like odor. It is used as a solvent and in the production of chemicals. The odor of monochlorobenzene can be detected in industrial and chemical facilities. |
| 202 | Monofluorotrichloromethane | B | Monofluorotrichloromethane, also known as CFC-11, is a colorless gas with a faint, ethereal odor. It was used as a refrigerant and propellant in aerosol sprays. The odor of monofluorotrichloromethane can be found in older refrigeration systems and appliances. |
| 203 | Moth balls | A | Moth balls are small balls of pesticide used to protect clothing from moth damage. They have a distinctive, strong odor and are commonly encountered in closets and storage areas. |
| 204 | Naphtha (Coal tar) | A | Naphtha derived from coal tar is a flammable liquid with a characteristic naphtha or kerosene-like odor. It is used in various industrial applications. The smell of naphtha (coal tar) can be found in industrial and manufacturing settings. |
| 205 | Naphtha (Petroleum) | A | Petroleum naphtha is a flammable liquid with a characteristic naphtha or gasoline-like odor. It is used as a solvent and in the production of chemicals. The odor of naphtha (petroleum) can be encountered in industrial and manufacturing settings. |
| 206 | Naphthalene | A | Naphthalene is a white crystalline compound with a strong, mothball-like odor. It is used as a pest repellent and in the production of chemicals. The odor of naphthalene can be detected in pest control products and industrial settings. |
| 207 | Nicotine | A | Nicotine is a colorless liquid with a bitter, acrid odor. It is found in tobacco and is used in the production of cigarettes and smoking products. The scent of nicotine is commonly found in areas where tobacco products are used. |
| 208 | Nitric acid | B | Nitric acid is a colorless liquid with a pungent, acrid odor. It is used in various industrial processes, including the production of fertilizers and explosives. The odor of nitric acid can be found in manufacturing and chemical facilities. |
| 209 | Nitrobenzene | A | Nitrobenzene is a yellow liquid with a sweet, almond-like odor. It is used in the production of chemicals and as a solvent. The odor of nitrobenzene can be detected in industrial and chemical facilities. |
| 210 | Nitroethane | A | Nitroethane is a colorless liquid with a sweet, fruity odor. It is used in the production of chemicals and as a solvent. The pleasant aroma of nitroethane can be found in industrial and manufacturing settings. |
| 211 | Nitrogen dioxide | C | Nitrogen dioxide is a reddish-brown gas with a sharp, acrid odor. It is a common air pollutant resulting from combustion processes. The odor of nitrogen dioxide can be found near sources of air pollution, including vehicle emissions and industrial facilities. |
| 212 | Nitroglycerine | A | Nitroglycerine is a yellow, oily liquid with a sweet, ethereal odor. It is used as an explosive and in the pharmaceutical industry. The distinctive scent of nitroglycerine can be encountered in manufacturing and medical settings. |
| 213 | Nitromethane | A | Nitromethane is a colorless liquid with a sweet, fruity odor. It is used in drag racing and as a solvent. The pleasant aroma of nitromethane can be found in racing events and industrial settings. |
| 214 | Nitropropane | A | Nitropropane is a colorless liquid with a sweet, fruity odor. It is used in the production of chemicals and as a solvent. The pleasant aroma of nitropropane can be found in industrial and manufacturing settings. |
| 215 | Nitrotoluene | A | Nitrotoluene is a yellow liquid with a sweet, flowery odor. It is used in the production of explosives and dyes. The pleasant aroma of nitrotoluene can be found in manufacturing and chemical facilities. |
| 216 | Nonane | A | Nonane is a flammable liquid with a faint gasoline-like odor. It is used in various industrial applications, including as a solvent and fuel. The odor of nonane can be found in manufacturing and chemical facilities. |
| 217 | Noxious gases | B | Noxious gases encompass a range of harmful and noxious fumes, including pollutants like sulfur dioxide, nitrogen oxides, and volatile organic compounds. They are commonly found near sources of pollution, industrial facilities, and areas with poor air quality. |
| 218 | Octalene | A | Octalene is a colorless liquid with a faint gasoline-like odor. It is used as a solvent and in the production of chemicals. The odor of octalene can be detected in manufacturing and chemical facilities. |
| 219 | Octane | A | Octane is a colorless liquid with a faint gasoline-like odor. It is commonly found in gasoline and is used as a fuel for internal combustion engines. The smell of octane is commonly encountered at gas stations and in areas where gasoline is used. |
| 220 | Odorants | A | Odorants are substances added to gases, such as natural gas and propane, to give them a distinct odor for safety reasons. The odor of odorants can be detected in the vicinity of gas leaks or gas-related appliances. |
| 221 | Odors | A | Odors encompass a wide range of scents and smells produced by various sources, including nature, humans, animals, and industrial processes. They can vary widely in character and intensity and are encountered in everyday life. |
| 222 | Onions | A | Onions have a pungent and distinct odor, characterized by a sulfurous and spicy aroma. They are commonly used as a culinary ingredient and are encountered in kitchens and dishes prepared with onions. |
| 223 | Organic chemicals | A | Organic chemicals are compounds that contain carbon-hydrogen (C-H) bonds and are found in various natural and synthetic substances. They are used in a wide range of applications and can produce diverse scents depending on their composition. |
| 224 | Ozone | A | Ozone is a pale blue gas with a sharp, fresh odor. It is a molecule made up of three oxygen atoms and is naturally found in the Earth's atmosphere. The scent of ozone is often associated with the air after a thunderstorm or in areas with electrical equipment. |
| 225 | Packing house odors | A | Packing house odors refer to the scents associated with processing and packaging of food products, particularly in meat and produce packing facilities. These odors can include a mix of smells from various foods and are commonly found in packing and processing plants. |
| 226 | Paint and redecorating odors | A | Paint and redecorating odors refer to the distinctive scents produced during painting, varnishing, and home renovation activities. These odors can vary depending on the type of paint or coatings used and are commonly encountered during construction and home improvement projects. |
| 227 | Palmitic acid | A | Palmitic acid is a white crystalline compound with a mild, fatty odor. It is found in various natural fats and oils and is used in the production of soaps and cosmetics. The scent of palmitic acid can be found in personal care products and skincare items. |
| 228 | Paradichlorbenzene | A | Paradichlorbenzene is a white crystalline compound with a strong, mothball-like odor. It is used as a pest repellent and deodorant in various products. The smell of paradichlorbenzene is commonly found in mothballs and pest control products. |
| 229 | Paste and glue | A | Paste and glue odors refer to the scents associated with adhesive products, including glue, paste, and other bonding agents. These odors can vary depending on the type of adhesive used and are commonly encountered in craft and industrial settings. |
| 230 | Pentane | B | Pentane is a highly flammable liquid with a faint gasoline-like odor. It is used as a solvent and in the production of chemicals. The odor of pentane can be detected in manufacturing and chemical facilities. |
| 231 | Pentanone | A | Pentanone, also known as methyl propyl ketone, is a colorless liquid with a sweet, minty odor. It is used as a solvent and in the production of artificial flavors. The pleasant aroma of pentanone can be found in scented products and flavorings. |
| 232 | Pentylene | B | Pentylene is a colorless liquid with a faint gasoline-like odor. It is used as a solvent and in the production of chemicals. The odor of pentylene can be found in manufacturing and chemical facilities. |
| 233 | Pentynes | B | Pentynes are a group of highly flammable gases with faint gasoline-like odors. They are used in various industrial applications, including welding and cutting processes. The smell of pentynes can be encountered in metalworking and industrial settings. |
| 234 | Perchloroethylene | A | Perchloroethylene, also known as perc, is a colorless liquid with a faint ether-like odor. It is used as a solvent and in dry cleaning processes. The odor of perchloroethylene can be detected in dry cleaning facilities and industrial settings. |
| 235 | Perfumes, cosmetics | A | Perfumes and cosmetics encompass a wide range of scents and fragrances used in personal care products and perfumery. These scents can vary widely in character, from floral and fruity to musky and woody, and are commonly found in skincare and beauty products. |
| 236 | Perspiration | A | Perspiration, or sweat, is the natural bodily fluid produced by sweat glands. It can have a slightly salty and musky odor and is commonly encountered during physical activity and in areas with poor ventilation. |
| 237 | Pet odors | A | Pet odors refer to the scents associated with pets, including dogs, cats, and other animals. These odors can vary depending on the type of pet and their hygiene and are commonly found in homes with pets. |
| 238 | Phenol | A | Phenol is a white crystalline compound with a sweet, medicinal odor. It is used in the production of disinfectants and pharmaceuticals. The smell of phenol can be detected in healthcare and industrial settings. |
| 239 | Phosgene | B | Phosgene is a colorless gas with a suffocating and irritating odor. It was used as a chemical weapon during World War I. The odor of phosgene can be found in industrial and chemical settings. |
| 240 | Pitch | A | Pitch is a dark, sticky substance with a strong, tar-like odor. It is derived from natural sources and is used in various applications, including construction and road paving. The scent of pitch is commonly encountered in roadwork and construction sites. |
| 241 | Plastics | A | Plastics encompass a wide range of synthetic materials used in manufacturing and everyday products. They can produce various scents, including the smell of new plastic items, and are commonly found in household and industrial settings. |
| 242 | Poisonous gases | B | Poisonous gases refer to highly toxic and harmful fumes, such as hydrogen cyanide, phosgene, and chlorine. They are commonly found near chemical and industrial facilities where these hazardous substances are handled or released. Poisonous gases pose severe health risks and can lead to respiratory distress, chemical burns, and even fatalities if not handled with extreme caution. The pungent, noxious odors associated with poisonous gases serve as warning signs and prompt individuals to evacuate the affected areas and seek immediate assistance in the event of a leak or exposure. These gases are frequently encountered in chemical manufacturing plants, laboratories, and industrial sites where safety measures and protective equipment are crucial to prevent accidents and health hazards. |
| 243 | Pollen | B | Pollen consists of tiny, powdery grains produced by flowering plants. It is a common cause of allergies and has a mild, earthy scent. Pollen can be found in the air during the pollination season. |
| 244 | Popcorn and candy | A | Popcorn and candy have sweet, buttery, or sugary scents, depending on the type and flavor. These scents are commonly encountered at movie theaters and snack bars. |
| 245 | Poultry odors | A | Poultry odors refer to the scents associated with chickens, turkeys, and other poultry. These odors can vary based on the type of poultry and their living conditions and are commonly found in farms and poultry processing facilities. |
| 246 | Propane | C | Propane is a colorless gas with a faint, sweet odor. It is commonly used as a fuel for heating, cooking, and in industrial applications. The smell of propane is encountered near gas cylinders and in areas where propane is used. |
| 247 | Propionaldehyde | B | Propionaldehyde is a colorless liquid with a pungent, fruity odor. It is used in the production of chemicals and as a flavoring agent. The aroma of propionaldehyde can be encountered in scented products and food flavorings. |
| 248 | Propionic acid | A | Propionic acid is a colorless liquid with a pungent, sour odor. It is used as a preservative in food and in the production of chemicals. The odor of propionic acid can be found in food products and industrial settings. |
| 249 | Propyl acetate | A | Propyl acetate is a colorless liquid with a sweet, fruity odor. It is used as a solvent and in the production of artificial flavors. The pleasant aroma of propyl acetate can be found in scented products and flavorings. |
| 250 | Propyl alcohol | A | Propyl alcohol, or n-propanol, is a colorless liquid with a faint, alcoholic odor. It is used as a solvent and in the production of chemicals. The odor of propyl alcohol can be detected in manufacturing and chemical facilities. |
| 251 | Propyl chloride | A | Propyl chloride is a colorless liquid with a pungent, chloroform-like odor. It is used in the production of chemicals and as a solvent. The odor of propyl chloride can be detected in industrial and chemical facilities. |
| 252 | Propyl ether | A | Propyl ether is a colorless liquid with a sweet, fruity odor. It is used as a solvent and in the production of artificial flavors. The pleasant aroma of propyl ether can be found in scented products and flavorings. |
| 253 | Propyl mercaptan | A | Propyl mercaptan is a sulfur compound with a strong, foul odor. It is commonly added to natural gas to give it a distinct odor for safety reasons. The pungent smell of propyl mercaptan can be encountered near gas leaks. |
| 254 | Propylene | C | Propylene is a colorless gas with a faint, sweet odor. It is used in various industrial processes, including the production of plastics and chemicals. The odor of propylene can be detected in manufacturing and chemical facilities. |
| 255 | Propyne | C | Propyne, also known as methylacetylene, is a highly flammable gas with a faint gasoline-like odor. It is used in welding and cutting processes. The smell of propyne can be encountered in metalworking and industrial settings. |
| 256 | Putrefying substances | B | Putrefying substances are organic materials that undergo decomposition, emitting a foul and rotten odor. They are commonly found in decaying organic matter, sewage, and waste disposal sites. |
| 257 | Pyridine | A | Pyridine is a colorless liquid with a fishy or ammonia-like odor. It is used in the production of chemicals and pharmaceuticals. The distinctive smell of pyridine can be encountered in industrial and chemical manufacturing settings. |
| 258 | Radioactive products | C | Radioactive products refer to materials that emit ionizing radiation, and they do not typically have a distinct odor. These materials are used in various scientific and medical applications and are commonly found in research and healthcare facilities. |
| 259 | Rancid oils | A | Rancid oils are vegetable or animal fats that have undergone spoilage, resulting in a pungent, sour, and unpleasant odor. They are commonly encountered in old or improperly stored cooking oils and food products. |
| 260 | Reodorants | A | Reodorants are products designed to mask or neutralize odors in the environment. They come in various scents and are commonly found in air fresheners and deodorizing agents. |
| 261 | Resins | A | Resins are semi-solid or solid substances with varying scents, depending on their type and composition. They are used in a wide range of applications, including adhesives, coatings, and art materials, and are commonly encountered in manufacturing and artistic settings. |
| 262 | Ripening fruits | A | Ripening fruits emit sweet and fruity scents as they mature, indicating their readiness for consumption. The scents vary depending on the type of fruit and are commonly found in kitchens and fruit storage areas. |
| 263 | Rotting paper | B | Rotting paper refers to paper products that have undergone decomposition, emitting a musty and earthy odor. It is commonly found in old books, documents, and damp paper materials. |
| 264 | Rubber | A | Rubber products have a faint, rubbery scent, characterized by a mild and neutral odor. They are commonly found in various everyday items, including tires, footwear, and industrial materials. |
| 265 | Sauerkraut | A | Sauerkraut is a fermented cabbage dish with a strong, sour and tangy odor. It is a traditional food in some cultures and is commonly encountered in dishes and culinary preparations containing sauerkraut. |
| 266 | Sewer odors | A | Sewer odors refer to the unpleasant and pungent scents associated with sewage systems and wastewater. These odors are commonly encountered near sewer systems and in areas with drainage issues. |
| 267 | Skatole | A | Skatole is a white crystalline compound with a strong, fecal odor. It is found in feces and is also used in the production of fragrances. The odor of skatole can be encountered in waste treatment facilities and some perfumes. |
| 268 | Slaughterhouse odors | B | Slaughterhouse odors refer to the scents associated with meat processing and slaughtering activities. These odors can be a mix of bloody, animal, and metallic scents and are commonly found in slaughterhouse and meatpacking facilities. |
| 269 | Smog | A | Smog is a type of air pollution resulting from the combination of smoke and fog. It has a hazy appearance and may have a characteristic, acrid odor. Smog is commonly encountered in areas with high air pollution, including urban and industrial regions. |
| 270 | Smoke | A | Smoke refers to the visible suspension of particles and gases produced by combustion. It can have various scents, depending on the source of the smoke, such as wood, tobacco, or burning materials. The smell of smoke is commonly found near fires and in smoking areas. |
| 271 | Soaps | A | Soaps come in various scents, including floral, herbal, and fresh fragrances. They are commonly found in personal care products and are used for cleaning and hygiene purposes. |
| 272 | Solvents | B | Solvents encompass a wide range of chemical substances used for dissolving or diluting other materials. They can produce various scents depending on their composition and are commonly found in industrial and manufacturing settings. |
| 273 | Sour milk | A | Sour milk has a distinct and sour odor, characterized by a tangy and unpleasant scent. It is commonly encountered in dairy products that have gone bad or spoiled. |
| 274 | Spilled beverages | A | Spilled beverages can produce a range of scents, including sweet, sugary, or fruity odors, depending on the type of beverage. These odors are commonly encountered in areas where beverages have been spilled. |
| 275 | Spoiled food stuffs | A | Spoiled food stuffs refer to food items that have gone bad or deteriorated, emitting a pungent, rancid, or foul odor. They are commonly encountered in food storage areas and refrigerators. |
| 276 | Stale odors | A | Stale odors encompass a range of scents associated with aged or stagnant air. They can have a musty, damp, or stagnant character and are commonly encountered in closed or poorly ventilated spaces. |
| 277 | Stoddard Solvent | A | Stoddard solvent, also known as mineral spirits, is a colorless liquid with a faint, sweet odor. It is used as a solvent and in cleaning applications. The odor of Stoddard solvent can be detected in industrial and cleaning settings. |
| 278 | Stuffiness | A | Stuffiness refers to the sensation of an enclosed space lacking fresh air. It is not characterized by a distinct odor but rather a feeling of discomfort related to poor ventilation. Stuffiness is commonly encountered in closed and poorly ventilated areas. |
| 279 | Styrene monomer | A | Styrene monomer is a colorless liquid with a sweet, fruity odor. It is used in the production of plastics and synthetic rubber. The pleasant aroma of styrene monomer can be found in manufacturing and chemical settings. |
| 280 | Sulfur compounds | A | Sulfur compounds encompass a wide range of substances that contain sulfur atoms and produce varying scents, including the characteristic rotten egg smell of hydrogen sulfide. They are commonly found in industrial, chemical, and natural environments. |
| 281 | Sulfur dioxide | C | Sulfur dioxide is a colorless gas with a sharp, suffocating odor. It is a common air pollutant resulting from combustion processes. The odor of sulfur dioxide can be found near sources of air pollution, including vehicle emissions and industrial facilities. |
| 282 | Sulfur trioxide | C | Sulfur trioxide is a white crystalline compound with a sharp, irritating odor. It is used in the production of chemicals and as a catalyst. The odor of sulfur trioxide can be detected in industrial and chemical settings. |
| 283 | Sulfuric acid | A | Sulfuric acid is a colorless liquid with a strong, pungent odor. It is used in various industrial processes, including battery production and chemical manufacturing. The odor of sulfuric acid can be found in manufacturing and chemical facilities. |
| 284 | Tar | A | Tar is a thick, dark, and sticky substance with a strong, acrid odor. It is produced by the distillation of organic materials and is used in various applications, including road paving. The smell of tar is commonly encountered in roadwork and construction sites. |
| 285 | Tetrachloroethane | A | Tetrachloroethane is a colorless liquid with a faint ether-like odor. It is used as a solvent and in the production of chemicals. The odor of tetrachloroethane can be detected in manufacturing and chemical facilities. |
| 286 | Tetrachloroethylene | A | Tetrachloroethylene, also known as perchloroethylene, is a colorless liquid with a faint ether-like odor. It is commonly used in dry cleaning processes and as a degreasing agent. The odor of tetrachloroethylene can be found in dry cleaning facilities and industrial settings. |
| 287 | Tetrahydrofuran (THF) | A | Tetrahydrofuran, or THF, is a colorless liquid with a faint, ether-like odor. It is used as a solvent and in the production of chemicals. The odor of THF can be detected in manufacturing and chemical facilities. |
| 288 | Theatrical makeup odors | A | Theatrical makeup odors refer to the scents associated with makeup and cosmetics used in the entertainment industry. These scents can vary depending on the type of makeup and are commonly encountered in theater and film production. |
| 289 | Tobacco smoke | A | Tobacco smoke has a distinct and often unpleasant odor characterized by the scent of burning tobacco. It is commonly encountered in areas where tobacco products are smoked, such as designated smoking areas. |
| 290 | Toilet odors | A | Toilet odors refer to the scents associated with restroom facilities. These scents can vary widely, from fresh and clean to foul and unpleasant, depending on the cleanliness and maintenance of the restroom. |
| 291 | Toluene | A | Toluene is a colorless liquid with a sweet, aromatic odor. It is used in the production of chemicals and as a solvent. The pleasant aroma of toluene can be found in manufacturing and chemical settings. |
| 292 | Toluidine | A | Toluidine is a colorless liquid with a pungent, amine-like odor. It is used in the production of dyes and pharmaceuticals. The distinctive smell of toluidine can be encountered in industrial and chemical manufacturing settings. |
| 293 | Trichlorethylene | A | Trichlorethylene is a colorless liquid with a faint ether-like odor. It is used as a solvent and in the production of chemicals. The odor of trichlorethylene can be detected in manufacturing and chemical facilities. |
| 294 | Turpentine | A | Turpentine is a colorless liquid with a strong, pine-like odor. It is derived from pine trees and is used as a solvent and in artistic and industrial applications. The scent of turpentine is commonly found in paint and art supply stores. |
| 295 | Urea | A | Urea is a white crystalline compound with a faint, ammonia-like odor. It is found in urine and is used in the production of fertilizers and skincare products. The scent of urea can be encountered in agricultural and healthcare settings. |
| 296 | Uric acid | A | Uric acid is a white crystalline compound with a faint, ammonia-like odor. It is found in urine and is associated with gout and kidney stones. The scent of uric acid can be encountered in healthcare settings. |
| 297 | Valeric acid | A | Valeric acid is a colorless liquid with a pungent, sweaty sock-like odor. It is used in the production of perfumes and artificial flavors. The odor of valeric acid can be found in some perfumes and flavorings. |
| 298 | Valeric aldehyde | A | Valeric aldehyde is a colorless liquid with a pungent, sweaty sock-like odor. It is used in the production of perfumes and artificial flavors. The scent of valeric aldehyde can be found in some perfumes and flavorings. |
| 299 | Vapors | A | Vapors refer to the gaseous form of substances that are typically in a liquid or solid state at room temperature. The scents of vapors can vary widely depending on the specific substance and are commonly found in various industrial and laboratory settings. |
| 300 | Varnish fumes | A | Varnish fumes refer to the scents associated with varnishing and finishing processes. These scents can vary depending on the type of varnish or finish used and are commonly encountered in woodworking and artistic settings. |
| 301 | Vinegar | A | Vinegar has a pungent, acidic odor and is commonly used in cooking and cleaning. It can vary in scent depending on the type of vinegar. |
| 302 | Vinyl chloride | B | Vinyl chloride is a colorless gas with a sweet, slightly ether-like odor. It is used in the production of various plastic materials. |
| 303 | Viruses | B | Viruses themselves do not have a characteristic odor; their detection relies on laboratory analysis and diagnostic techniques. |
| 304 | Volatile materials | B | Volatile materials refer to substances that can easily evaporate and release odors, often used in industrial processes and products. |
| 305 | Waste products | A | Waste products can have various odors, depending on their composition. They encompass a wide range of materials and substances. |
| 306 | Wood alcohol | B | Wood alcohol, also known as methanol, has a slightly sweet odor and is used in industrial applications and as a solvent. |
| 307 | Xylene | A | Xylene is a colorless liquid with a sweet, aromatic odor. It is used as a solvent in various industrial and chemical processes. |
The information presented in the table is based on a compilation of various sources and is provided for guidance and reference purposes only. While every effort has been made to ensure the accuracy and reliability of the data, the specific characteristics and performance of activated charcoal may vary depending on factors such as source material, manufacturing processes, and environmental conditions. Therefore, the information in this table should be considered as a general guideline and not as a definitive standard.
Users are encouraged to exercise their judgment and conduct further research or testing when considering the use of activated carbon for specific applications or situations. The table’s data may not cover all possible scenarios, and individual circumstances may require tailored approaches.
No warranty or guarantee, expressed or implied, is provided regarding the suitability or effectiveness of activated charcoal for any particular purpose. Users are advised to consult with relevant experts, professionals, or authorities when making decisions related to the use of activated charcoal for specific applications.