PFAS-free is a materials claim, not a lab test

What the page measures

PFAS — per- and polyfluoroalkyl substances — are the chemistry behind classic PTFE (Teflon) nonstick. The suitability page asks: among products that carry a coating, what share use a PFAS-free coating? It answers with a classification built from product materials and listing/spec rules. It does not run a chemical assay.

The numbers

• Tagine: 100% PFAS-free in the classification (n=406).
• Double boiler: 97.5% (n=198).
• Butter warmer: 94.6% (n=111).
• Pot lids and steaming baskets also show 100% (n=121 and n=25).

The top of the chart is dominated by products whose surface is not a PTFE nonstick coating: clay, glass, stainless steel and uncoated metal. The classification is mostly separating coated from uncoated, not testing one coating against another.

What “PFAS-free” means here

It means: the material and spec rules did not find a PFAS-containing coating on the product. It does not mean:

• a laboratory tested the pan for PFAS,
• the coating is proven safe under all cooking conditions,
• the listing’s “PFAS-free” marketing claim has been verified.

A product can be misclassified because the listing is incomplete or the material field is wrong. A product can also be PFAS-free in the coating but use a PFAS-containing release agent or component elsewhere. The dataset cannot see that.

What it means for a buyer

• Check the coating family first. PTFE is the classic PFAS chemistry; ceramic, enamel, stainless and bare cast iron are different surfaces. The page is a map of materials, not a safety score.
• Treat “PFAS-free” on a listing as a claim. Ask the maker for the specific chemistry or a test report if this matters to you.
• Do not use a category share as a product guarantee. A 100% category share with a 406-product sample does not certify the pan in your cart.
• Read the health question separately. This site publishes review-derived data, not a toxicological assessment. For health guidance, use a regulator or a lab, not a review statistic.

What this does not tell you

There is no chemical testing in the dataset. The classification is inferred from materials and listing text, and it is labelled with confidence 0.7 on the source page. The 2023 snapshot cannot reflect later reformulations. The chart is useful for understanding what coatings dominate a product type; it is not evidence that any specific pan is safe or unsafe.