PFOS (Perfluorooctane sulfonic acid)

High Concern

PFAS

Also known as

pfosperfluorooctane sulfonic acidperfluorooctane sulphonate

The concern

IARC Group 1 carcinogen. Linked to kidney cancer, bladder cancer, and non-Hodgkin lymphoma. Banned under the Stockholm Convention. Persists in human blood and accumulates over time.

Read the source: IARC

What to look for on labels

This ingredient may appear under any of the following names or codes on product labels:

PFOS (Perfluorooctane sulfonic acid)
pfos
perfluorooctane sulfonic acid
perfluorooctane sulphonate

Learn more

Read the full evidence directly from the authoritative source.

View source: IARC

Other pfass to know about

PFOA (Perfluorooctanoic acid)

HIGH

IARC Group 1 carcinogen (causes kidney cancer and testicular cancer in humans).

GenX Chemicals

MEDIUM

Developed as a replacement for PFOA but exhibits similar toxicity and persistence.

Data sourced from IARC, FDA, EFSA, WHO and EWG public data. For informational purposes only. This does not constitute medical or legal advice.

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