New Additions to the Proposition 65 List

December 20, 2021

Read the full article by Steven M. Siros (Jenner & Block)

"Over the past week, several new per- and polyfluoroalkyl substances (PFAS) have been added to California’s Proposition 65 list. In March 2021, California’s Office of Environmental Health Hazard Assessment (OEHHA) selected perfluorooctane sulfonate (PFOS) and its salt and transformation and degradation precursors for evaluation by California’s Carcinogenic Identification Committee (CIC). OEHHA also selected perfluoronanoic acid (PFNA) and perfluoroundecanoic acid (PFDA) for evaluation by California’s Reproductive Toxicant Identification Committee (DARTIC).

Several industry groups submitted comments in opposition to adding these PFAS chemicals to the Proposition 65 lists. For example, even though PFOS has been voluntarily phased out of production in the United States, the American Chemistry Council opposed listing PFOS as a carcinogen under Proposition 65, claiming that the available data doesn’t support a conclusion that PFOS presents a carcinogenic risk to humans.

Notwithstanding this industry opposition, on December 6, 2021, the CIC voted 8-2 with one abstention to add perfluorooctane sulfonate (PFOS) and its salt and transformation and degradation precursors to the Proposition 65 list of chemicals known to the State of California as causing cancer. It is important to note that PFOS had previously been on the Proposition 65 list due to its alleged reproductive toxicity. "