✓ Verified from official sourcesLast updated: 2026-05-10

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ℹ️ Figures shown are reference-only — always confirm against the latest official sources.

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California Proposition 65 Guide

The most-litigated US consumer-product compliance rule. If you sell into California, you must address it — even though there's no government certification.

1.What Prop 65 actually is

Prop 65 (officially: California Safe Drinking Water and Toxic Enforcement Act of 1986) requires businesses to give 'clear and reasonable' warning before exposing California residents to any of ~900 listed chemicals known to cause cancer, birth defects, or reproductive harm. It is enforced by California's Attorney General AND by private 'bounty hunter' law firms — they collect 25% of any settlement. The bounty-hunter mechanism is what makes Prop 65 so heavily enforced.

Common chemicals in robots that trigger Prop 65

Lead — solder, brass connectors, vinyl insulation
Bisphenol A (BPA) — polycarbonate plastics
Phthalates (DEHP, DBP, BBP) — flexible cables, PVC parts
Cadmium — older PCBs, batteries
Brominated flame retardants — circuit boards, plastic enclosures
Nickel — connector pins, decorative coatings
Crystalline silica — battery housings

2.Warning label requirements

If your product contains any listed chemical above the safe-harbor threshold, you must include a 'clear and reasonable' warning. There are two compliant formats.

Long-form warning (preferred safest)

⚠️ WARNING: This product can expose you to chemicals
including [chemical name], which is known to the State
of California to cause [cancer / birth defects / both].
For more information go to www.P65Warnings.ca.gov.

Short-form warning (rules tightened January 1, 2025)

⚠️ WARNING: Cancer and Reproductive Harm
www.P65Warnings.ca.gov

Note: As of January 1, 2025 OEHHA tightened short-form rules — chemicals must now be named in many cases. Confirm against the current OEHHA regulation.

Where to display the warning

On the product label or hangtag (most common)
On packaging facing the consumer
On the e-commerce listing page (Amazon: in product description)
On the receipt at point of sale (rare)

3.Penalties — why this matters

💸 Maximum fine: $2,500 per violation per day

A bounty-hunter lawsuit on a single SKU can claim hundreds of violations across thousands of days. Typical settlements: $20K – $200K + attorney fees + injunctive relief (you must add the warning + provide proof going forward).

Real-world risk for Chinese mfrs

Chinese sellers on Amazon are a top target. Bounty-hunter firms scan Amazon for products without Prop 65 warnings, buy one, send it to a lab, and file. The cheapest defense is to put the warning on EVERY product entering California by default — even if testing might not require it.

4.The 3 ways to comply

Always-warn

Add the warning to every product. No testing needed. Cheapest, but reduces conversion (consumers see warning and worry).

Test + warn-if-needed

$1.5K – $3K

Lab tests for listed chemicals. If below safe-harbor threshold → no warning needed. Higher upfront, better marketing.

Reformulate

Variable

Substitute non-listed materials (e.g. lead-free solder, BPA-free plastic). Engineering change required.

5.Testing — how it works

A lab tests representative samples for each listed chemical relevant to your product (typically 5-15 chemicals depending on materials).

Test panel	Cost	Turnaround
Heavy-metals screen (lead, cadmium, mercury, arsenic, chromium VI)	$300–$500	1–2 weeks
Phthalates panel (8 most-restricted)	$200–$400	1–2 weeks
Brominated flame retardants	$300–$500	2 weeks
Full Prop 65 robotics package	$1,500–$3,000	2–4 weeks

6.Frequently asked questions

Do I need Prop 65 if I don't ship to California?
Only if you ship to California. But e-commerce makes geographic restriction nearly impossible — Amazon, Walmart, retailer marketplaces will ship anywhere. Most exporters comply nationwide.
Is there a 'Prop 65 certified' badge?
No. There's no government certificate. Compliance = either (a) the warning label, or (b) lab test reports showing chemicals below safe-harbor thresholds.
What if I just put the warning on every product?
Legal — and the cheapest defense. Some sellers do this. Drawback: California consumers see warnings everywhere, which dulls the signal AND your conversion may drop 5-10%.
Will Amazon enforce this for me?
Amazon Brand Registry has Prop 65 fields you must fill in. Amazon does NOT defend you against bounty-hunter lawsuits — you remain liable as the seller of record.
What's the safe-harbor threshold?
OEHHA publishes 'No Significant Risk Levels' (NSRL) for cancer chemicals and 'Maximum Allowable Dose Levels' (MADL) for reproductive toxins. Below these, no warning required. Listed in the chemical-list page on OEHHA's site.
Can I get a 60-day cure period?
Bounty-hunter plaintiffs MUST send a 60-day notice before suing. Use that window to fix the labeling. Doesn't always avoid penalty but reduces it significantly.
Does Prop 65 apply to B2B sales?
Yes — but you can shift compliance to the buyer with a written warranty + indemnification. Common for OEM/wholesale.
Are there exceptions for small companies?
Yes — businesses with <10 employees are exempt. But once you cross 10 employees OR sell through a larger distributor, the exemption is lost.

Get a Prop 65 quote

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Official sources

Always verify against the latest official source before submission. Information here is reference-only.

⚠️ Important: Max Robotics is a coordination platform. We are not FCC engineers, lawyers, or a certification body, and we do not guarantee certification approval.

ℹ️ Figures shown are reference-only — always confirm against the latest official sources.

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