A Group B2 is Compounds for which animal data are sufficient to demonstrate a cause-and-effect relationship between Exposure and cancer incidence (rate of occurrence) in animals, and human data are inadequate or absent. In the national-scale assessment, the 15 air toxics classified as probable (B2) human carcinogens are: acetaldehyde, carbon tetrachloride, chloroform, 1,3-dichloropropene, ethylene dibromide, ethylene dichloride, hexachlorobenzene (HCB), hydrazine, lead compounds, methylene chloride, PCBs, polycyclic organic matter (POM), perchloroethylene, propylene dichloride, trichloroethylene.
Group C (possible human carcinogen): Compounds for which animal data are suggestive to demonstrate a cause-and-effect relationship between exposure and cancer incidence (rate of occurrence) in animals. In the national-scale assessment, the 4 air toxics classified as possible human carcinogens are: acrolein, mercury compounds, quinoline and 1,1,2,2-tetrachloroethane. Because unit risk estimates have not been developed for acrolein and mercury compounds, EPA has not estimated cancer risk for these pollutants.
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Group B1 | ■■■■■■■■■■ |
A Group B1 is Compounds for which limited human data suggest a cause and effect relationship between . . . Read More | |
Group A (human carcinogen) | ■■■■■■■■■■ |
Group A (human carcinogen) : A Group A (human carcinogen) is Compounds for which human data are sufficient . . . Read More | |
Group D (not classifiable as to human carcinogenicity) | ■■■■■■■■■■ |
A Group D (not classifiable as to human carcinogenicity) is Compounds for which human and animal data . . . Read More | |
Mercury | ■■■■■■ |
Mercury is a naturally occurring element that is found in air, water, and soil. It exists in several . . . Read More | |
Hazardous Air Pollutant Exposure Model | ■■■■■■ |
Hazardous Air Pollutant Exposure Model : The Hazardous Air Pollutant Exposure Model, Version 4 (HAPEM4) . . . Read More | |
Health | ■■■■■ |
Health in the environmental context refers to the state of well-being and the absence of harm or illness . . . Read More | |
Acclimatization | ■■■■■ |
An Acclimatization is the physiological and behavioral adjustments of an Organism to changes in its environmentAcclimatization . . . Read More | |
Yttrium at top500.de | ■■■■■ |
The term Yttrium (symbol Y) refers to an element with an atomic number of 39, and is generally classified . . . Read More | |
Ozone-depleting substance | ■■■■■ |
German: A compound that contributes to stratospheric ozone depletion. Ozone-depleting substances (ODS) . . . Read More | |
Chemical Compound | ■■■■■ |
A Chemical Compound is a distinct and pure substance formed by the union or two or more elements in definite . . . Read More |