# Bloomingdale's Prop 65 Warning Field Guide

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**Prop 65 Warning** holds the California Proposition 65 warning for a product that needs one. Proposition 65 is the California law that requires a warning before exposing consumers to listed chemicals, and marketplaces that ship into California expect sellers to supply the warning with the product data so it can be shown on the product page. On Bloomingdale's the field is optional, set once per style group, and accepts up to 4096 characters. Leave it blank for any product that does not carry a Prop 65 warning; a warning that is not needed is as much of a problem as a missing one.

Bloomingdale's taxonomy also has a longer companion field, [Prop 65 Warning Text](/marketplaces/bloomingdales/fields/fnb20-prop-65-warning-text), for the full warning verbiage. Osello's recommendation is to fill both with the same warning whenever a product needs one, so the statement is complete no matter which field Bloomingdale's displays.

## The rules

| Rule | Value |
| --- | --- |
| Required | No |
| Level | Parent (one value per style group) |
| Maximum length | 4096 characters |
| Content | The Prop 65 warning exactly as it appears on your packaging or compliance documentation |

Osello's recommendations:

- Copy the warning from your compliance team or packaging word for word. Do not paraphrase it, shorten it or translate it.
- Name the chemical the same way the warning on the product does.
- Keep it to the warning itself. Care instructions, general safety notes and marketing copy belong elsewhere.
- Blank means no warning applies. Never write "N/A" or "None"; that text would be displayed to shoppers.

## Examples

| Value | Verdict |
| --- | --- |
| The Prop 65 warning printed on the product's hangtag, copied in full | Good |
| "Contains chemicals" | Weak: not the warning, and names nothing |
| "N/A" | Weak: shows up as product copy; leave the field blank instead |
| The warning plus a paragraph about the brand's safety testing | Weak: only the warning belongs here |

## How Osello fills this field

Prop 65 Warning is a parent-level text field, so one value covers every colorway and size of the style. Osello fills it only from a warning already present in your product data, for example a metafield your compliance process populates (see [using Shopify metafields](/help/products/using-shopify-metafields)), and leaves it blank when the source has none. It never composes a warning on its own.

## Frequently asked questions

### Is the Prop 65 Warning required on Bloomingdale's?

No. It is optional and should only be filled for products that carry a Proposition 65 warning.

### Which products need one?

Products that expose consumers to a chemical on California's Proposition 65 list at a level that requires a warning. That determination comes from your compliance team or supplier, not from the marketplace.

### Why are there two Prop 65 fields?

Bloomingdale's taxonomy carries both a Prop 65 Warning and a longer Prop 65 Warning Text field. Osello recommends putting the same warning in both whenever a product needs one.

### Can the warning vary by colorway?

No. The field is set on the parent listing and shared by every variant, so a warning that applies to only one colorway needs that colorway listed as its own style.