EU Label Compliance

United States

Proposition 65 warning labels: wording, symbol and when they are needed

Proposition 65 is not a product ban and not a safety standard. It is a warning law, and it is enforced largely by private plaintiffs, which is why it produces more letters than inspections.

Example of the label this guide describes
Fac-simile of the file we deliver. Specimen data, invented company.

When a warning is required

When a product can expose a person in California to a listed chemical above the safe harbour level. The list runs to about a thousand substances and moves; lead, phthalates, formaldehyde, BPA and certain flame retardants account for most consumer cases.

Exposure, not presence, is the test. A substance sealed inside a component that nobody touches may not require a warning at all — but that judgement belongs to a laboratory and a lawyer, not to a label.

What the warning has to look like

The safe harbour warning uses the word WARNING in capitals, a yellow equilateral triangle with an exclamation mark, the name of at least one listed chemical, the risk category — cancer, birth defects or other reproductive harm — and the address www.P65Warnings.ca.gov.

The short form is allowed on smaller packages under the current rules, with its own restrictions on when it can be used. The long form names the chemical and the effect and is the safer default on packaging with space.

Mistakes that cancel the protection

A warning printed so small or so far from the display panel that it is not 'clear and reasonable'. A warning listing chemicals that are not actually present, which courts treat as over-warning. A warning translated into another language without also carrying the English required text.

How we handle it

You tell us which listed chemical applies, from your supplier declaration or a test report. We place the correct short or long form with the compliant symbol, typography and URL, in the position that keeps it clear and reasonable on your layout.

How enforcement actually happens

Most Proposition 65 cases begin with a private plaintiff sending a sixty-day notice, not with a state inspection. The notice names the product, the chemical and the exposure route, and copies the Attorney General.

Settlements commonly combine a civil penalty with a commitment to warn or reformulate. Sellers who already had a compliant warning in place generally end the matter quickly; those who had none pay for the education.

The practical defence is documentation: supplier declarations, test reports, and a dated record of which warning was applied to which production run.

Short form, and when it stopped being easy

The short form warning was widely used because it fitted anywhere. Amendments have narrowed when it may be used and now require the chemical to be named in most cases, which removes the reason many sellers chose it.

Where the package genuinely cannot carry the long form, the short form with the named chemical is the route, and the online listing must carry the same warning before purchase.

Online and catalogue sales

For internet purchases the warning must appear before the consumer completes the transaction — on the product page, not only in the box. Marketplaces provide a dedicated field, and leaving it empty while the label carries the warning is still a failure.

Long form and short form

Long formShort form
SymbolYellow triangle with exclamation markSame, smaller
Signal wordWARNINGWARNING
ChemicalNamed, with effectNamed, under the current rules
URLwww.P65Warnings.ca.govSame
Best usedPackaging with spaceSmall packages only

How the pieces fit

The same information, in the order an inspector or a reviewer meets it.

Long form and short form1Symbol2Signal word3Chemical4URL5Best used

Words that keep coming up

Safe harbour level
The exposure threshold below which no warning is required, set per chemical as an NSRL or MADL.
NSRL
No Significant Risk Level, for carcinogens.
MADL
Maximum Allowable Dose Level, for reproductive toxicants.
Sixty-day notice
The formal notice a private plaintiff must serve before suing.

Questions people ask

Can I put a Prop 65 warning just in case?

You can, and many sellers do, but blanket warnings have been criticised by courts and by the state. Warn where an exposure is credible.

Does the warning need to be on the product itself?

On the label, the packaging or, for online sales, in the listing before purchase. Marketplaces have their own field for it.

Do I need it outside California?

No, but most sellers cannot segregate stock, so the warning ends up on everything shipped to the United States.

Does Prop 65 apply to businesses with under ten employees?

Businesses with fewer than ten employees are exempt, but the marketplace and the retailer above you usually are not.

Do I need a separate label for California?

Most sellers apply the warning to all US stock rather than segregating it.

Is a warning an admission?

No, and the statute says so, but over-warning has been criticised by courts and by the state.

Related guides

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