California EPA’s Office of Environmental Health Hazard Assessment (OEHHA) has added, effective September 13, 2013, trichloroacetic acid to its Proposition 65 (Prop. 65) list of chemicals known to the state to cause reproductive health effects.

Commonly used for cosmetic treatments, such as chemical skin peels, tattoo removal and the treatment of warts, skin tags and moles, trichloroacetic acid works by removing the top few layers of skin, allowing new skin cells to appear. Substances added to the Prop. 65 list are those identified as known to the state to cause cancer or reproductive risk. Companies using the chemicals in products sold in California must provide warnings to consumers.