Any seller shipping products to California
Prop 65 for Amazon & E-Commerce Sellers (2026)
Proposition 65 is the most litigated consumer protection law in the United States — and the most misunderstood by e-commerce sellers. The law is straightforward, but the enforcement mechanism (private lawsuits by bounty hunter attorneys) creates an outsized risk for sellers who don't understand the landscape.
Quick Answer
California Prop 65 requires businesses to warn consumers about products containing chemicals known to cause cancer or reproductive harm. For Amazon sellers, this usually means adding a Prop 65 warning to your listing and packaging. Testing for safe harbor levels is optional but protects against lawsuits.
Why You're Probably Here
You received a Prop 65 notice of violation (60-day notice letter) from an attorney
This is the start of a Prop 65 bounty hunter lawsuit. You have 60 days to respond. Settlements typically range from $20,000-$50,000 for small sellers. Don't ignore it.
You're not sure if your product needs a Prop 65 warning for California sales
If your product contains any of the 900+ chemicals on the Prop 65 list above safe harbor levels, you need a warning. The practical question is whether adding the warning is easier than proving you're below the threshold.
A competitor's listing has a Prop 65 warning and yours doesn't — for the same type of product
If similar products in your category have Prop 65 warnings and yours doesn't, you're a target. Bounty hunter attorneys look for inconsistencies within product categories.
What Matters Most
Prop 65 is enforced by private lawsuits, not government agencies
The real enforcement mechanism is bounty hunter attorneys who file lawsuits for profit. They target sellers missing warnings in product categories where warnings are standard. Settlements average $20,000-$50,000 for small sellers.
Adding the warning is almost always cheaper than fighting
Proving your product is below safe harbor levels requires testing ($200-$2,000+ per chemical). Adding the warning to your listing and packaging costs nearly nothing. For most sellers, the warning is the rational choice.
Requirements
Proposition 65 Warning Requirement
RequiredCal. Health & Safety Code 25249.6
Products containing chemicals on the Prop 65 list above safe harbor levels must provide a "clear and reasonable" warning to California consumers before exposure.
Why it applies: Applies to any product sold to California consumers that contains listed chemicals. The list has 900+ chemicals including lead, cadmium, BPA, phthalates, and many others.
What this means for you: If you sell to California (which you do if you sell on Amazon), you're subject to Prop 65. For most sellers, adding the warning is cheaper and safer than proving your product is below safe harbor levels.
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What Sellers Get Wrong
Not adding a Prop 65 warning because "my product doesn't have chemicals"
Why sellers do this: Sellers assume Prop 65 only applies to obviously chemical products.
The reality: Lead is in brass, stainless steel, and ceramic glazes. Cadmium is in some pigments. BPA is in some plastics. Nearly every product category has Prop 65 exposure — the question is whether it exceeds safe harbor levels.
Adding a generic Prop 65 warning without the specific chemical name
Why sellers do this: Sellers copy a generic "this product contains chemicals known to the State of California" warning.
The reality: Since 2018, Prop 65 warnings must list the specific chemical(s) involved. Generic warnings without chemical names may not satisfy the current requirements.
Thinking Prop 65 only applies to products sold in California stores
Why sellers do this: Sellers think online sales to California aren't covered.
The reality: If a California resident can buy your product online, you're subject to Prop 65. Amazon sellers ship to California by default.
What Most Guides Won't Tell You
The bounty hunter attorneys follow patterns
Prop 65 attorneys target specific product categories where violations are easy to prove and settlements are profitable. High-risk categories: food contact products (lead in ceramics/stainless steel), dietary supplements, jewelry, and electronics cables.
Safe harbor testing can preempt lawsuits
If you test your product and levels are below safe harbor, you have an affirmative defense against lawsuits. Testing costs $200-$500 for common chemicals (lead, cadmium, BPA). For high-value products, it's worth it.
Amazon has a Prop 65 warning field in Seller Central
You can add a Prop 65 warning directly in your product listing attributes in Seller Central. Use it — it's the easiest way to demonstrate compliance.
What To Do Next
Determine your Prop 65 exposure
Check if products in your category commonly have Prop 65 warnings. If competitors are warning, you probably should be too.
Decide: warn or test
For most sellers, adding the warning is the safer and cheaper option. If you want to sell without a warning, you'll need safe harbor testing to prove levels are below thresholds.
Add warnings to your listings and packaging
Include the specific chemical name(s) in your warning. Use Amazon's Prop 65 field in Seller Central. Add the warning to physical packaging for products shipped to California.
Consider safe harbor testing for high-value products
If a Prop 65 warning hurts your product's marketability, invest in safe harbor testing ($200-$500) to prove your levels are below thresholds.
Scan your product for the full compliance picture
Prop 65 is just one piece. Run a Prodovo Labs scan to identify every requirement for your product, including state-level regulations beyond California.
Frequently Asked Questions
Do I need Prop 65 warnings on Amazon listings?
What happens if I get a Prop 65 notice of violation?
Can I just add a Prop 65 warning to everything?
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