Proposition 65 List

The Proposition 65 list is the official catalogue of chemicals ‘known to the state of California to cause cancer, birth defects or other reproductive harm’ maintained by OEHHA. As of April 2026, the list contains approximately 900 chemicals. OEHHA updates the list periodically — chemicals are added through the four listing mechanisms (CIC/DARTIC determination, authoritative body, Labor Code, regulatory listing). OEHHA publishes the list in PDF and Excel format on its website; the Excel version includes listing dates, safe harbour levels, and listing mechanism for each chemical. Businesses must screen their products and operations against the current Proposition 65 list.

California Health & Safety Code §25249.8; OEHHA Proposition 65 list at oehha.ca.gov/proposition-65/proposition-65-list; updated continuously.

The Proposition 65 list is the starting point for all compliance assessments. Businesses should download the current list (Excel format) from OEHHA and systematically screen their product formulations, raw materials, and manufacturing processes against all listed chemicals. Key chemicals to monitor in electronics and consumer products include: lead, cadmium, mercury, arsenic, chromium(VI), phthalates (multiple), BPA, BPS (newly listed January 2025), acrylamide, styrene, formaldehyde, and various solvents. The list should be reviewed at least quarterly as new chemicals are added.