Prop 65 cart disclosure

A Prop 65 product-page disclosure does not automatically appear on the cart — cart is a separate display surface

Prop 65 Warning Manager (Shopify App Store) displays California Prop 65 warnings on product pages and keeps an audit trail of warning edits, assignments, and storefront activation events. Every warning needs merchant approval before it goes live. Publish from templates citing 27 CCR §§ 25601–25607, including 2028 short-form text with chemical names. Cart display is a native Product Disclosures job — product page and cart are separate Display preferences. The app does not decide whether an exposure requires a warning. This page is not legal advice.

Related: CLPLens — Hazard pictograms on the product page, not only the parcel.

Free check first: Prop 65 warning question check runs in your browser and sends nothing. Describe a product and see which list names and 27 CCR warning rules to read.

Two native surfaces: product page and cart

Shopify Product Disclosures can target the product page and the cart through Display preferences. Completing the product-page surface does not imply the cart. Shopify Help Adding product disclosures documents options for displaying a disclosure on the online store’s product pages and cart page. shopify.dev product disclosures names the Display preferences surfaces as product_page, cart, and checkout, and states that disclosures render natively on the product details page and cart. Checkout is a third surface and needs a Checkout UI extension. Product listings gained a Disclosures field on 17 June 2026.

In Admin, open the product → Disclosures → set Display preferences for the surfaces you need, then Save. Selecting product page alone leaves cart off unless you also select cart.

Install Prop 65 Warning Manager

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When cart display matters

Shopify Help calls out cart display when a disclosure on the product page might not be viewed. Two cases Help names:

• A quick add button that adds a product straight to the cart from a collection page.
• Add-on products that need a disclosure, when the add-on product page may never be viewed because it is set to Unlisted.

In those flows, select Cart in that disclosure’s Display preferences so the warning can show on the customer’s cart page. This page does not add extra legal checklists beyond that Help guidance.

The theme still has to render cart disclosures

Admin Display preferences and the theme have to agree. Selecting Cart in Admin is the storefront-location flag. The theme still has to render disclosures on the cart. Help notes that some sales channels, online store themes, or custom storefronts might not support certain display types. Confirm the live cart after Admin and the theme both include that surface.

Install Prop 65 Warning Manager

Live listing: apps.shopify.com/momiji-prop-65-warning-manager. Native Disclosures can put a warning on the product page and the cart. The listing is the approval and storefront-activation audit path. Not legal advice.

Not the same as jurisdiction, checkout ship-to, 2028 copy, alcohol, or an approval desk

• California-only / US-CA jurisdiction — who the structured disclosure applies to, not which Online Store surface renders it. See California-only / US-CA.
• Ship-to-California at checkout — a checkout shipping-address job, not Display preferences on the cart. See ship-to-California at checkout.
• 2028 chemical-name short form — warning content for goods labeled on or after 1 January 2028, not the cart-versus-PDP surface split. See Prop 65 warning on the product page.
• Alcohol disclosure type — wine, beer, and spirits use the alcohol type, not the cart surface itself. See alcohol disclosure type.
• Native disclosures vs approval and audit log — cart display is not an approval desk. Showing a warning on the cart and requiring merchant approval before go-live are different jobs. See native disclosures vs approval and audit log.

App path: approval and storefront-activation audit — optional for cart display

Native Product Disclosures can cover product-page and cart surfaces without an app. Use Prop 65 Warning Manager when you also need the jobs the listing describes: merchant approval before any warning goes live, and an audit trail of warning edits, assignments, and storefront activation events, including 2028 short-form templates that name a listed chemical (27 CCR §§ 25601–25607).

1. Set native Display preferences so the product page and, when Help’s cases apply, the cart are both selected. Confirm the live cart on your theme.
2. Open the Prop 65 Warning Manager listing when several people can edit products and you need approve-before-go-live plus the activation audit trail.
3. Attach a cited template, review and approve before go-live, then keep the audit record of what published.

The app helps display and document warning content the merchant chooses. It does not decide whether an exposure requires a warning. This page is not legal advice.

Install Prop 65 Warning Manager

What this page is not

• Not legal advice, a compliance certification, or a decision that Prop 65 applies to a product.
• Not a Checkout UI extension tutorial. Checkout is a third surface in Shopify’s docs; this page is the cart-versus-product-page split.
• Not a substitute for the sibling pages on US-CA jurisdiction, ship-to-California checkout, 2028 chemical-name short form, alcohol type, or approval-versus-native display.

Install Prop 65 Warning Manager

Related pages

• Native product disclosures vs approval and audit log — cart display is not the approval desk
• Prop 65 2028 product-page warning — chemical-name short form and label dates
• California-only / US-CA Prop 65 — jurisdiction on structured Disclosures
• Prop 65 at checkout when shipping to California — ship-to-CA is not the cart surface
• Prop 65 alcohol disclosure type — wine, beer, spirits use the alcohol type
• Shopify Help: Adding product disclosures — Display preferences for product pages and cart
• shopify.dev: Product disclosures — product_page, cart, and checkout surfaces
• Prop 65 Warning Manager — live App Store listing
• Shopify apps hub
• Tools

Not legal advice. Not a compliance guarantee. Confirm 27 CCR Article 6 and the live OEHHA materials before you publish warning copy. Native Disclosures can target the product page and the cart as separate Display preferences. Prop 65 Warning Manager is the approval and storefront-activation audit path.