On 16 September 2016, the California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment (OEHHA) published a Notice of intent1 to identify perfluorooctanoic acid (PFOA, CAS No.335-67-1) and perfluorooctane sulfonate (PFOS, CAS No.1763-23-1) as known to the state to cause reproductive toxicity under the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65).
PFOA and PFOS are the chemicals of a large group of perfluoroalkyl substances (PFASs) that are used to make products more resistant to stains, grease, and water. They can be used in carpets, outdoor garments, cooking utensils etc. Due to the strong carbon-fluorine bonds, they are persistence in the environmental and accumulative along the food chain. Hence, various countries impose legislation on the use of these chemicals. In the European Union, PFOA is identified as a Substance of Very High Concern and listed on the REACH Candidate List and the European Commission proposes to restrict PFOA and its similar substances under REACH Annex XVII. For PFOS, it is regulated under POPs Regulation (EC) No 850/2004.
The OEHHA reviewed the study reports2,3 of PFOA and PFOS from US Environmental Protection Agency (EPA) and found PFOA and PFOS meet the criteria for listing as causing reproductive toxicity. Thus the OEHHA determined to include both substances in the Proposition 65 List. After issuing the Notice of intent, the OEHHA is required to collect comments within 30 days. The commenting period is extended to 16 November 20164as requested.