Carcinogen Identification Committee (CIC)

The Carcinogen Identification Committee (CIC) is the state’s qualified experts body within OEHHA’s Scientific Advisory Panel responsible for identifying chemicals as known to cause cancer for purposes of Proposition 65 listing. The CIC evaluates scientific evidence on carcinogenicity and can vote to list chemicals as carcinogens when the evidence clearly shows cancer causation in humans or animals. The CIC can also review chemicals for potential delisting. In December 2025, OEHHA referred ethoprop to the CIC for review for possible delisting from the Proposition 65 carcinogen list.

California Health & Safety Code §25249.8(b)(1); Title 27 CCR §§25302–25306 (CIC procedures); OEHHA December 19, 2025 announcement on ethoprop review.

Manufacturers and importers should monitor CIC meeting agendas and decisions, as a CIC vote to list a chemical triggers a formal listing process within approximately 12 months. Businesses using chemicals under CIC review should begin exposure assessments and consider proactive product reformulation. Conversely, CIC delisting reviews provide an opportunity for industries to present evidence that a chemical no longer meets the cancer causation standard.