Substances known to cause cancer.
There are five recommended standard hazard descriptors:
- Carcinogenic to Humans - indicates strong evidence of human carcinogenicity.
- Likely to Be Carcinogenic to Humans - the weight of the evidence is adequate to demonstrate carcinogenic potential to humans but does not reach the level for Carcinogenic to Humans.
- Suggestive Evidence of Carcinogenic Potential - appropriate when the weight of evidence is suggestive of carcinogenicity.
- Inadequate Information to Assess Carcinogenic Potential - when available data are judged inadequate for applying one of the other descriptors.
- Not Likely to Be Carcinogenic to Humans - data is considered robust for deciding that there is no basis for human hazard concern.
See also: Air Toxics.