Pentachlorophenol Added to California Prop 65 List
Effective Oct. 21, California’s Office of Environmental Health Hazard Assessment has added pentachlorophenol and byproducts of its synthesis (complex mixture) 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). Since this list was first published in 1987 it has grown to include approximately 900 chemicals.
ST&R will host a webinar Oct. 25 to review the requirements and implications of the recent changes to the Prop 65 regulations. Click here for more information or to register.
Beginning one year after a chemical is added to the Prop 65 list businesses are required to provide a “clear and reasonable” warning before knowingly and intentionally exposing anyone to that chemical unless they can show that the anticipated exposure level will not pose a significant risk of cancer or is significantly below levels observed to cause birth defects or other reproductive harm. This warning can be given in several ways; e.g., labeling a consumer product. However, no such warning is required if exposure to a chemical occurs at or below any established safe harbor level.
Prop 65 also prohibits companies that do business within California from knowingly discharging listed chemicals into sources of drinking water, a requirement that kicks in 20 months after a chemical is listed.