Chemicals listed effective October 24, 1997 as known to the State to cause cancer or reproductive toxicity by the State's Qualified Experts: 2,4,5-trimethylaniline and its strong acid salts, 5-chloro-o-toluidine and its strong acid salts, and quinoline and its strong acid salts.
Proposition 65
Proposition 65, officially known as the Safe Drinking Water and Toxic Enforcement Act of 1986, was enacted as a ballot initiative in November 1986. The proposition protects the state's drinking water sources from being contaminated with chemicals known to cause cancer, birth defects or other reproductive harm, and requires businesses to inform Californians about exposures to such chemicals.
Proposition 65 requires the state to maintain and update a list of chemicals known to the state to cause cancer or reproductive toxicity.
Questions?
Questions about Proposition 65? Check our Frequently asked Questions page or visit our Proposition 65 Warnings website
About Proposition 65
The Safe Drinking Water and Toxic Enforcement Act
The Proposition 65 List
The current Proposition 65 list is dated December 29, 2023
Meetings, Hearings and Workshops
Upcoming and past meetings, hearings and workshops
Notices
All Proposition 65 Notices
Laws and Regulations
Links and downloads related to Proposition 65 statute and regulations
Warnings
Visit this website to learn about warnings for exposures to chemicals on the Proposition 65 List
How chemicals are added to the Proposition 65 list
Learn how chemicals are added to the list
Safe Use Determinations
A Safe Use Determination (SUD) is a written statement issued by OEHHA, which interprets and applies Proposition 65 and its implementing regulations to a specific set of facts in response to a request by a business or a trade group
Interpretive Guidelines for Proposition 65
An Interpretive Guideline interprets Proposition 65 and its implementing regulations, as applied to specific facts
Information Letters
Letters about Proposition 65's application from OEHHA to interested parties.
Warning Regulations
Clear and reasonable warnings
Searchable Proposition 65 Chemical Database
Search the Proposition 65 Chemical Database
Safe harbor levels
Proposition 65 No Significant Risk Levels (NSRLs) and Maximum Allowable Dose Levels (MADLs)
Reports, Notices, Documents
December 9, 1997 Meeting of the Science Advisory Board's Developmental and Reproductive Toxicant (DART) Identification Committee on Benzene
Request for information and notice of availability of draft data summaries and draft priorities for chemicals with respect to their potential to cause cancer: acronycine, 2-aminofluorene, 2-amino-5-(5-nitro-2-furyl)-1,3,4-oxadiazole, 4-amino-2-nitrophenol, N-butyl-N-nitrosourea, bis(2-chloro-1-methylethyl)ether, 2,5-dimethoxy-4’-aminostilbene, estragole, N-ethyl-N-formylhydrazine, furfural, p-chloronitrobenzene, trichloroacetic acid, 2-biphenylamine (and strong acid salts), bromoethane, chlorthal-dimethyl, cyanazine, 2,4-dichlorophenoxyacetic acid and its salts and esters, dapsone, dimethyl hydrogen phosphite, malonaldehyde and its salts, b-thioguanine deoxyriboside, zearalenone, bis(tri-n-butyltin)oxide, dicofol, di(2-ethylhexyl)adipate, patulin
pentachloronitrobenzene, piperonyl sulfoxide. [Postponed: salicylazosulfapyridine,
C.I. solvent yellow 14 (Sudan 1)]
Availability of final data summaries and priorities for 33 chemicals with respect to their potential to cause cancer
Notice of availability of final data summaries and priorities for chemicals with respect to their potential to cause birth defects or other reproductive harm via authoritative bodies and State's Qualified Experts mechanisms: Aldrin, 1,3-butadiene, Carbon tetrachloride, Chlordane, Ethylene dibromide, Formaldehyde, Heptachlor, Methylene chloride, 2,4,5-T butyl ester, Trichloroethylene, Vinyl chloride, Acrylamide, DDT, Carbamazepine, Progesterone