Substances known to cause cancer.

There are five recommended standard hazard descriptors:

  1. Carcinogenic to Humans - indicates strong evidence of human carcinogenicity.
  2. 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.
  3. Suggestive Evidence of Carcinogenic Potential - appropriate when the weight of evidence is suggestive of carcinogenicity.
  4. Inadequate Information to Assess Carcinogenic Potential - when available data are judged inadequate for applying one of the other descriptors.
  5. 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.

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Subjects: Chemistry Medical