Polycyclic aromatic hydrocarbons. formed by industrial processes and during combustion of fossil fuels and other substances; include some potent carcinogens.
See polycyclic aromatic hydrocarbon.
polycyclic aromatic hydrocarbon. A group of aromatic hydrocarbons having three or more aromatic nuclei in their structures.
a group of organic compounds known as polycyclic aromatic hydrocarbons, comprising for the purposes of the Regulations six substances: fluoranthene, benzo 3,4 fluoranthene, benzo 11,12 fluoranthene, benzo 3,4 pyrene, benzo 1,12 perylene and indeno (1,2,3-cd) pyrene.
Polycyclic Aromatic Hydrocarbon. a chemical compound composed of fused six carbon rings.
polycyclic aromatic hydrocarbon. Any of various organic compounds composed of a few to many six-membered rings of carbon atoms linked by an alternating sequence of single and double bonds and to which hydrogen atoms are attached.
Polycyclic aromatic hydrocarbon. A class of organic compounds with a fused-ring aromatic structure. PAHs result from incomplete combustion of organic carbon (including wood), municipal solid waste, fossil fuels, and natural or anthropogenic introduction of uncombusted coal and oil. PAHs include benzo(a)pyrene, fluoranthene, and pyrene.
Polynuclear aromatic hydrocarbon
Polycyclic Aromatic Hydrocarbons. a class of chemicals which are by-products of the combustion of petroleum products that can cause lethal and sub-lethal impacts on estuarine organisms.
POLYCYCLIC AROMATIC HYDROCARBON. Any of a class of hydrocarbon molecules with multiple carbon rings that include numerous carcinogenic substances and environmental pollutants.
Polycyclic aromatic hydrocarbons. A highly reactive group of multi-ring organic compounds, at least some of which are carcinogens.
Polycyclic aromatic hydrocarbons (PAHs) are environmental contaminants that are primarily derived from the incomplete combustion of any organic material, including fossil or synthetic fuels. In the aluminum industry, PAHs are generated in smelters using older Söderberg technology. PAHs are also generated by forest fires, wood heating and incineration.
Polycyclic aromatic hydrocarbon. A group of over 100 different chemicals that are formed during the incomplete burning of coal, oil and gas, garbage, or other organic substances. PAHs are usually found as a mixture containing two or more of these compounds, such as soot. PAHs are found in coal tar, crude oil, creosote, and roofing tar, but a few are used in medicines or to make dyes, plastics, and pesticides.
Polycyclic aromatic hydrocarbons. (occasionally polyaluminum hydroxide)
Polycyclic aromatic hydrocarbons. 7 chemicals that are part of a class of compounds called polycyclic organic matter (POM). They are: benz[a]anthracene; benzo[b]fluoranthene; benzo[k]fluoranthene; benzo[a]pyrene; chrysene; dibenz[a,h]anthracene; and indeno[1,2,3-cd]pyrene. They are all probable human carcinogens.
polycyclic or polynuclear aromatic hydrocarbons. A class of complex organic compounds, some of which do not easily break down and may cause cancer. PAH compounds are formed from the combustion or burning of organic material and are widespread in the environment. PAHs are commonly formed by forest fires and by the combustion of gasoline and other petroleum products. They often reach the environment through atmospheric fallout and highway runoff.
Polycyclic Aromatic Hydrocarbons (water chemistry)
polyaromatic hydrocarbons
polyaromatic hydrocarbon (certain PAHs are toxins)
polycyclic aromatic hydrocarbons. compounds found in combustion tars, created in the burning of nearly all fuels, which are metabolically activated (especially in the liver) to a mutagenic and carcinogenic form. These are probably the most important human chemical carcinogens and are suspected of being responsible for many of human cancers other than solar ultraviolet induced skin cancers. Tobacco smoke is by far the most important source of humans. They are also found in relatively large quantities on charcoal broiled meats.
Polycyclic aromatic hydrocarbons, the oldest known carcinogenic in humans, emitted from burning fossil fuels. Sources include thermal power plants, coke ovens, sewage, wood smoke and used lubricating oils.
(polycyclic aromatic hydrocarbons) - The carcinogenic byproducts of some very sub-stoichiometric combustion processes. Usually absent in process burners.
