Effective May 3, 2001, the Office of Environmental Health Hazard Assessment (OEHHA) within the California Environmental Protection Agency added four chemicals to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 ):

  • androstenedione (CAS No. 63-05-8)
  • dibromoacetonitrile (CAS No. 3252-43-5)
  • hexachlorobutadiene (CAS No. 87-68-3)
  • malonaldehyde, sodium salt (CAS No. 24382-04-5)

The listings of androstenedione, dibromoacetonitrile, and malonaldehyde, sodium salt are based on formal identifications by the National Toxicology Program (NTP) that the chemicals cause cancer.  The listing of hexachlorobutadiene is based on a formal identification by the U.S. Environmental Protection Agency (U.S. EPA) that the chemical causes cancer.

Click on the link for more information and a complete, updated Prop 65 list.