I. What is California Proposition 65 (Prop 65)
Full name: Safe Drinking Water and Toxic Enforcement Act of 1986, commonly referred to as Prop 65. It was passed by California voters and administered by OEHHA (Office of Environmental Health Hazard Assessment).
Key point: Prop 65 is not a certification. No official certificate is issued. It is a mandatory state law. Core objective: Protect consumers’ right to know.
The list contains over 900 known chemicals that cause cancer, birth defects or reproductive toxicity. The substance list is continuously updated with new chemicals added every year.
Core rule: If a product contains chemicals on the list and human exposure exceeds the safe harbor limit, a clear and reasonable WARNING label must be provided. It does not ban product sales. Failing to provide the required warning constitutes a violation of law.
II. Which Products Need to Comply with Prop 65?
Although this law is only mandatory within California, traffic on Amazon US nationwide marketplace reaches California buyers. Listing on Amazon US means you will face Prop 65 compliance risks.
High-risk categories (frequent litigation targets):
- Electrical & electronic products: power adapters, data cables, headphones, small home appliances. Hazardous substances: lead, cadmium, phthalates, flame retardants
- Children’s products: toys, stationery. California limits are stricter than federal CPC standards. CPC compliance does notguarantee Prop 65 compliance.
- Jewelry: alloy ornaments with high risks of lead and cadmium leaching
- Home furniture: sofas, carpets, kitchenware, ceramic tableware. Formaldehyde, BPA, heavy metals
- Textiles, footwear and bags: PVC accessories, rubber soles. Phthalates, dyestuffs
- Beauty tools, outdoor goods, hardware tools, etc.
Critical misconception: Compliance is not judged by total substance content in materials. The evaluation criterion is human accessible exposure level, which differs from EU RoHS logic. Even impurities introduced from raw materials (not intentionally added) trigger warning obligations if exposure exceeds limits.
III. Two Compliance Pathways (choose one)
Path 1: Exposure below safe harbor limits → No warning label required
Conduct testing and exposure assessment at an ISO 17025 accredited laboratory.
- Demonstrate chemical exposure from the product is below NSRL / MADL safe harbor thresholds
- Retain full test reports and assessment documents for inspection, recommended retention period: 5–10 years
- No WARNING label needed on physical goods or product listings
Path 2: Exposure exceeds safe harbor limits → Mandatory full warning (2026 updated warning format)
Warnings must appear on physical packaging, user manuals and Amazon product detail pages. Consumers must see the warning before purchase. Standard updated warning example:
WARNING: This product can expose you to chemicals including [insert specific chemical name], which are known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
IV. Amazon US Latest Prop 65 Requirements (2026)
Amazon does not actively require sellers to upload a “Prop 65 certificate”. Risks are triggered passively with severe consequences once non-compliance is identified. Amazon does not accept arbitrary test reports as proof of compliance. Key review checks include:
- ISO 17025 accreditation of the testing laboratory
- Complete exposure assessment rationale
- Compliant warning wording, consistent both online and offline
Scenarios that trigger reviews:
- Buyer complaints, third-party attorney testing issuing 60-day violation notices
- Category audits, safety risk random sampling
Once you receive a Prop 65 notice: Amazon may withhold disbursements, require sellers to defend or settle claims. In serious cases, listings will be removed and selling privileges restricted.
Practical backend tips for sellers
- If a warning is required, display the official warning prominently on product detail pages. Do not only print it on outer packaging.
- Request test and assessment documents from suppliers. Sellers bear final compliance responsibility.
- Do not rely on verbal assurances from factories. Always obtain written reports for filing.
