California Prop 65 from China Supplier: What Buyers Must Ask (and Verify)

1. Understand what Prop 65 actually requires before you write the spec. California's Safe Drinking Water and Toxic Enforcement Act of 1986 (commonly “Prop 65”) is administered by the state's Office of Environmental Health Hazard Assessment (OEHHA). OEHHA maintains a list of more than 900 chemicals known to cause cancer, birth defects, or reproductive harm. Products sold into California that expose consumers to a listed chemical above its safe-harbor level need a clear warning. Enforcement comes from the state attorney general and from private citizen plaintiffs, who recover a share of penalties and routinely file 60-day pre-litigation notices — thousands a year across consumer-goods categories. Importers and brand owners are typically named alongside manufacturers, so the obligation is yours regardless of where the factory sits.

2. Know which chemicals come up most often in goods made in China. Six recurring offenders cover the majority of consumer cases: lead in brass fittings, PVC coatings, ceramics, and paints; cadmium in plastic colorants and electroplating; phthalates such as DEHP, DBP, BBP, and DINP in flexible PVC and vinyl; formaldehyde emissions from MDF, particleboard, and plywood; BPA in polycarbonate and can linings; and nickel in costume jewelry and metal hardware. If your product touches any of those material families, plan for Prop 65 exposure until a test report proves it is below the safe-harbor threshold. Cosmetics, children's products, and anything with composite wood or flexible plastic are the highest-frequency categories.

3. Ask the supplier six specific questions before you sign. Which Prop 65 chemicals are present in each material, and at what measured quantity? Can the factory provide third-party test reports — SGS, Bureau Veritas, Intertek, TÜV, or Eurofins are the names buyers see most often — covering each listed chemical against its OEHHA safe-harbor level? What is the written substitution policy if a material or supplier changes mid-production? Will the factory accept a Prop 65 indemnity clause in the contract? Who applies the warning label, and on what surface — product, retail package, or shipping carton? Are testing records retained for the full statutory enforcement window? Get the answers in writing during sampling, not after FOB.

4. Verify the test reports rather than trusting the PDF. Each major lab (SGS, BV, Intertek, TÜV) operates a public report-authentication portal — type the report number and supplier name and confirm the report exists and matches. Two specifics matter: the report must name your SKU and the production lot, not a generic material certificate; and the test date must be current relative to the production lot — a 2022 lead test on a 2026 production run is not a current report. For higher-stakes categories such as children's products, jewelry, and cosmetics, commission an independent confirmatory test from a US- or EU-based laboratory on incoming samples before the master order ships. The cost is small compared with a 60-day notice settlement, and a clean independent test is the cleanest defense if a citizen plaintiff appears later.

5. Plan the warning and the indemnity now, not after a notice arrives. If a chemical is unavoidable above safe-harbor levels, a properly formatted Prop 65 warning — on product label, on retail packaging, or in the listing where the product is sold — is a legitimate compliance path. Decide who applies the label, what wording is used (the 2025 short-form requires naming at least one chemical), and where it sits relative to the master carton mark. Match the contract: a Prop 65 indemnity clause that names the factory as the responsible party for hidden material substitutions is standard in 2026 sourcing contracts and shifts negotiating leverage if a notice later arrives. None of this is a substitute for legal advice on your specific product — please consult counsel before relying on any structure described here.