TikTok Shop Prop 65: What the Yes/No Attribute Proves — and What It Doesn't

California Proposition 65 is usually described as a warning law. On TikTok Shop, it arrives as a dropdown: CA Prop 65: Carcinogens and CA Prop 65: Reprotoxic Chemicals, each set to Yes or No for every US listing. That dropdown is not a legal conclusion. It is a declaration about whether your product needs a warning, and both answers carry consequences.

The practical problem is that TikTok Shop's question and California's legal trigger are not the same question. TikTok Shop asks, in effect, whether your product contains a listed chemical. California asks whether a person would be exposed to a listed chemical at a level that requires a warning. A seller can answer the platform correctly and still ship a package label that does not comply, or answer No without any evidence for that position. This article explains the difference, shows where the warning has to appear, and gives a review order you can use before you select either answer.

The short answer: Yes and No are both compliance claims

Selecting Yes tells TikTok Shop to display a Prop 65 warning on the product detail page and tells the platform which chemicals to name. It does not prove that the warning text matches California's content rules, that the same warning appears on the package, or that the chemical list is complete. Selecting No is a substantive statement that no Prop 65 warning is required. That statement should rest on a formulation, a supplier declaration, a test report, or an exposure assessment — not on the product feeling low-risk.

California's warning duty is in Health and Safety Code section 25249.6. It applies to a person "in the course of doing business" who "knowingly and intentionally" exposes an individual to a chemical known to the state to cause cancer or reproductive toxicity, without first giving a "clear and reasonable warning." The duty is not triggered by the word "chemical" on a label. It is triggered by the exposure, subject to the exemptions in section 25249.10.

Two exemptions matter in practice. Section 25249.10(c) says a warning is not required if the responsible person can show the exposure poses no significant risk assuming lifetime exposure for a carcinogen, and no observable effect at 1,000 times the level for a reproductive toxicant. The burden of showing that is on the defendant. Section 25249.10(a) covers exposures where federal law governs warning in a way that preempts state authority. There is also a 12-month grace period after a chemical is listed, under section 25249.10(b).

What TikTok Shop now requires

TikTok Shop's US policy article California Proposition 65 Requirements is dated 10/07/2026 and applies to the United States. It tells sellers to determine whether their products contain a listed chemical and, if so, to select Yes for the CA Prop 65 Carcinogens or Reproductive Chemicals attribute and choose the corresponding chemicals. Selecting Yes displays a warning on the product detail page. The policy also says all product packaging must include compliant Prop 65 warning labels.

The platform can ask for evidence. TikTok Shop says it may request a lab test report for specific chemicals, and that a seller has 60 days to submit the report or update the listing with the required warnings. If no action is taken, the product will be deactivated. The same policy says that if a seller updates the attributes to reflect the presence of the chemicals, a test report is no longer required. That sentence resolves TikTok Shop's document request. It does not resolve the California exposure question.

A separate TikTok Shop guide, Your Guide to Product Detail Page (PDP) Compliance (09/16/2026), requires a Yes or No declaration for every US listing under both CA Prop 65 and CPSC Choking Hazard. The guide warns that a missing declaration may lead to product removal, temporary listing deactivation, or other enforcement. That makes "I did not answer" a bad strategy, even when the product is genuinely outside Prop 65.

What California law actually triggers

OEHHA maintains the Proposition 65 list, which must be updated at least once a year and has grown to more than 900 chemicals since it was first published in 1987. OEHHA has also established more than 300 safe harbor levels. A safe harbor level is an exposure level that does not require a warning: a No Significant Risk Level (NSRL) for chemicals listed as causing cancer, and a Maximum Allowable Dose Level (MADL) for chemicals listed as causing birth defects or other reproductive harm. OEHHA's own explanation is direct: a business does not need to provide a warning if exposure occurs at or below these levels.

That is why "contains a listed chemical" and "requires a warning" are different conclusions. A product can contain a listed chemical and still fall below the relevant safe harbor level. A product can also contain a listed chemical for which OEHHA has no safe harbor level, in which case the business must make a significant-risk determination without a preset number. In either case, the analysis is product-specific. It depends on the chemical, the amount, the route of exposure, and how the product is used.

The business-size rule is narrower than many sellers assume. Section 25249.11(b) excludes from "person in the course of doing business" any person employing fewer than 10 employees. The definition turns on the number of employees, not on the seller's state of residence. A remote seller that sells into California should not treat the 10-employee rule as an out-of-state safe harbor, and a marketplace listing does not change the analysis.

The consequences are real. Section 25249.7(b)(1) sets a civil penalty of up to $2,500 per day for each violation, in addition to any other penalty established by law. Section 25249.7(d)(1) allows a private person to bring an action in the public interest more than 60 days after giving notice to the Attorney General, the relevant district attorney, city attorney, or prosecutor, and the alleged violator, with a certificate of merit. The Attorney General, district attorneys, and city attorneys may also bring actions. A warning does not mean a product is banned or illegal; it is a right-to-know disclosure. But the absence of a required warning is enforceable, and a warning is not a cure for a separate safety violation.

OEHHA's October 2026 notices show why the calendar matters. The agency announced its intent to list atrazine, PFBA, PFDA, and PFHxA and related salts, with comment periods running into November 2026. Those are notices of intent, not current listings as of 2026-11-04. A seller should not add a chemical to a warning solely because a proposal was published, but should track the effective listing date because the 12-month grace period in section 25249.10(b) runs from listing.

Where the warning has to appear

California does not accept one warning channel as a substitute for every other channel. The regulations describe several methods of transmission, and an internet sale adds a product-page requirement.

The internet rule is the one most often missed. Section 25602(b) says that for internet purchases, a conforming warning "must also be provided" on the product display page. The regulation also says a warning is not prominently displayed if the purchaser must search for it in the general content of the website. For a TikTok Shop listing, that means the warning generated by the platform attribute is useful, but it is not a complete compliance file by itself. The package still needs a conforming label, and the listing still needs a warning that is actually prominent.

What the words must say

The full-form safe harbor warning has four elements: the yellow triangle symbol with a black exclamation point (black and white is allowed when the label is not printed in yellow), the word WARNING:, CA WARNING:, or CALIFORNIA WARNING: in all capital letters and bold, the chemical name, and the endpoint. The regulation supplies the exact sentences.

Cancer: "This product can expose you to chemicals including [name of one or more chemicals], which is [are] known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov."

Reproductive toxicity: "This product can expose you to chemicals including [name of one or more chemicals], which is [are] known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov."

Both endpoints: "This product can expose you to chemicals including [name of one or more chemicals], which is [are] known to the State of California to cause cancer, and [name of one or more chemicals], which is [are] known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov."

The short-form warning is narrower. OEHHA amended the short-form rules in a rulemaking approved by the Office of Administrative Law on 2024-11-26 and effective 2025-01-01. The change requires at least one chemical name in the short-form warning and gives businesses that relied on the old short form three years to transition. Section 25603(c) preserves the older short-form content for a product "manufactured and labeled prior to January 1, 2028," regardless of when that product is later sold. That transition matters for existing inventory. It does not authorize a new label designed in 2026 to omit the chemical name.

A generic warning that names no chemical is therefore a poor default for new packaging. It may be the old short form on qualifying pre-2028 inventory, but a seller should not assume that a warning copied from another product, or a warning that says only "Cancer and Reproductive Harm," satisfies the current content rule for a newly manufactured label.

Who is responsible for a private-label listing

Section 25600.2 allocates the work between the manufacturer or importer and the retail seller. A manufacturer, producer, packager, importer, supplier, or distributor may comply by labeling the product or by giving the business a written notice that identifies the product, states that it may cause an exposure, includes the necessary warning materials (including internet warning language), and is renewed annually. The retail seller is responsible for placing and maintaining the warning materials it receives, including warnings for products sold over the internet.

The retail seller also has direct responsibility in five situations: it sells under a brand or trademark it owns or licenses; it knowingly introduces a listed chemical; it covers, obscures, or alters a warning label; it receives a notice and warning materials but sells without conspicuously posting them; or it has actual knowledge of the exposure and there is no manufacturer, importer, supplier, or distributor that is a covered business with a California agent or place of business. For a private-label TikTok Shop seller, the first situation is the one to watch. If the listing carries your brand, you should not assume the supplier's generic warning statement transfers the whole obligation away from you.

Why "No" needs a file, not a feeling

A defensible No starts with a record. Useful evidence includes the formulation or bill of materials, a supplier declaration that identifies the listed chemicals screened, a test report for the finished product, and — where the question is close — an exposure assessment against the relevant NSRL or MADL. A test report is evidence, but it is not a legal conclusion: a report showing that a chemical is present does not prove the exposure exceeds a safe harbor level, and a report showing that one chemical is absent does not cover the rest of the list.

Three shortcuts fail. "The product is natural" is not an exposure analysis; some listed chemicals occur naturally. "The supplier said it is compliant" is not a record unless the supplier identified the chemicals and the basis. "The item is small" is not a category exemption. If there is no safe harbor level for a chemical, the business must make a significant-risk determination, and under section 25249.10(c) the burden of proving that exemption is on the defendant.

Keep the file even after the listing goes live. TikTok Shop's 60-day response window is short, and a marketplace request can arrive months after launch. The file should let you answer three questions without rebuilding the analysis: what is in the product, what is the basis for Yes or No, and where is the warning.

A review order that matches how the failures happen

1. Identify your role. Are you the importer, the private-label owner, or a reseller? The answer changes who must place the warning and who is exposed if it is missing.
2. Map the materials, not just the product name. Look at components that commonly carry listed chemicals, such as brass or painted metal, PVC, inks, dyes, and soft plastics. Treat this as a screening list, not a finding.
3. Check the current list and the safe harbor level. Use OEHHA's list and safe harbor tables, and note the date you checked them. A chemical that was proposed last month may not be listed yet.
4. Decide Yes or No with a written basis. If Yes, identify the chemical and the endpoint. If No, identify the evidence and the person who reviewed it.
5. Build the warning content. Use the full-form sentence for a new label, or the current short form with at least one chemical name. Do not omit the chemical name on new packaging.
6. Place the warning in both channels. Put a conforming label on the package and make the warning prominent on the product detail page. Do not make the buyer search for it.
7. Reconcile the rest of the copy. A "lead-free," "non-toxic," or "baby-safe" claim next to a lead warning is a contradiction that invites a closer look. Fix the claim or the product, not just the warning.
8. Keep the file and the response path. Record the lot, the test date, the label artwork, and the PDP screenshot. If TikTok Shop requests a report, the 60-day window starts before you may be ready.

Three hypothetical examples

These examples are illustrative. They are not legal advice and do not describe any real product.

Hypothetical 1: brass jewelry with a lead component. A seller imports brass earrings and lists them as "lead-free." A component tests positive for lead above the relevant safe harbor level. The seller should select Yes for the carcinogen and reproductive endpoints, name lead in the warning, and correct the "lead-free" claim. A Prop 65 warning does not make a contradictory "lead-free" statement acceptable, and the warning does not resolve any separate CPSC or state jewelry requirement.

Hypothetical 2: a PVC yoga mat with DEHP. A private-label seller sources a PVC mat and receives a supplier declaration that does not identify plasticizers. DEHP is a listed chemical, and the seller has no exposure assessment. Selecting No would be a position without a file. The better path is to test the finished product, compare the result with the relevant safe harbor level, and either warn or document why no warning is required. The decision belongs to the seller whose brand is on the mat.

Hypothetical 3: a children's backpack with lead in the zipper. A seller adds a Prop 65 warning and treats the matter as closed. That is not enough if the product is also subject to a children's product safety rule. A Prop 65 warning is a disclosure; it is not a certification that the product meets CPSC requirements. The seller should review the separate children's product obligations before relying on the warning.

What a text checker can and cannot do

A listing and script checker can read the English copy you paste in and flag phrases that conflict with a warning decision — for example, "lead-free" on a listing that also warns about lead, or "non-toxic" used as a blanket safety claim. That is useful before publication, because the contradiction is often in the marketing copy rather than in the warning itself.

A text checker cannot test materials, measure exposure, choose the correct safe harbor level, or confirm that a package label meets section 25603. It also cannot guarantee that TikTok Shop will accept the listing or that a regulator will agree with the analysis. Use it to catch copy problems, then keep the chemical and exposure file separate. You can run a draft listing through the TikTok Shop Claim Checker, and review the broader platform-enforcement picture in the TikTok Shop violation points guide.

Frequently asked questions

Does every product sold to California need a Prop 65 warning?

No. A warning is required only when the business knowingly and intentionally exposes an individual to a listed chemical at a level that requires a warning, subject to the exemptions in section 25249.10. Exposure at or below an established safe harbor level does not require a warning. A product can contain a listed chemical and still be below that level, which is why the analysis is product-specific.

Is selecting "No" on TikTok Shop a legal certification?

It is a platform declaration, not a government certificate. But it is still a statement that no warning is required, and you should be able to support it with a formulation, supplier declaration, test report, or exposure assessment. TikTok Shop may request a lab report, and the platform's 60-day response window applies. A No without a file is a weak position in both a marketplace review and a later demand letter.

Does a Prop 65 warning mean the product is unsafe or banned?

No. Proposition 65 is a right-to-know law. The warning discloses a possible exposure; it does not itself ban the product or establish that it violates a safety standard. The reverse is also true: a warning does not cure a separate violation under another law, such as a CPSC children's product rule or an FDA labeling requirement.

Can I use the old short-form warning without naming a chemical?

Only for a product manufactured and labeled before January 1, 2028. Section 25603(c) preserves that older content for qualifying inventory regardless of when it is sold. A label designed or manufactured after that date should use the current short form with at least one chemical name, or the full-form warning. The 2025 amendments gave businesses a three-year transition, not a permanent exemption.

Does the TikTok Shop PDP warning replace the package label?

No. The product detail page and the package are separate transmission points. Section 25602(b) requires a conforming warning on the product display page for internet purchases, and TikTok Shop separately requires compliant packaging labels. A platform-generated PDP warning does not establish that the physical label is compliant, and a compliant label does not automatically make the PDP warning prominent.

Sources

• TikTok Shop, California Proposition 65 Requirements, applies to the United States, page dated 2026-10-07. seller-us.tiktok.com/university/essay?knowledge_id=2205898533881643 (reviewed 2026-11-04).
• TikTok Shop, Your Guide to Product Detail Page (PDP) Compliance, applies to the United States, page dated 2026-09-16. seller-us.tiktok.com/university/essay?knowledge_id=4007545728452407 (reviewed 2026-11-04).
• California Office of Environmental Health Hazard Assessment, The Proposition 65 List. oehha.ca.gov/proposition-65/proposition-65-list (reviewed 2026-11-04).
• California Office of Environmental Health Hazard Assessment, Proposition 65 No Significant Risk Levels (NSRLs) and Maximum Allowable Dose Levels (MADLs). oehha.ca.gov/proposition-65/general-info (reviewed 2026-11-04).
• California Office of Environmental Health Hazard Assessment, What are safe harbor numbers? p65warnings.ca.gov/faq/businesses/what-are-safe-harbor-numbers (reviewed 2026-11-04).
• California Office of Environmental Health Hazard Assessment, Proposition 65: Clear and Reasonable Warnings — Safe Harbor Methods and Content, rulemaking approved 2024-11-26, effective 2025-01-01. oehha.ca.gov/proposition-65/crnr (reviewed 2026-11-04).
• California Health and Safety Code sections 25249.6, 25249.7, 25249.10, and 25249.11. leginfo.legislature.ca.gov (reviewed 2026-11-04).
• California Code of Regulations, title 27, sections 25600.2, 25602, and 25603, as reproduced by Cornell Legal Information Institute. law.cornell.edu/regulations/california/27-CCR-25602 (reviewed 2026-11-04; the official text is available through Westlaw).

This article explains published platform rules and California legal requirements for general information. It is not legal advice. TikTok Shop, OEHHA, the Attorney General, or a court makes the final decision on a specific product and listing.