USA - Intention to List Three Chemical Substances Under Proposition 65

​The California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment (OEHHA) intends to list coal-tar pitch, fluoro-edenite fibrous amphibole, and silicon carbide whiskers as known to the state to cause cancer under the Safe Drinking Water and Toxic Enforcement Act of 1986​.

​Coal-tar pitch is mainly used in electrode manufacture, roofing and paving.

There is no information showing the uses and application of fluoro-edenite fibrous amphibole. However, there is sufficient evidence in humans that exposure to fluoro-edenite fibrous amphibole causes mesothelioma, and sufficient evidence of carcinogenicity in experimental animals.

Silicon carbide whiskers are used as reinforcement materials for ceramics, metals and plastics.​​

The comment period is open until October 23, 2023.​