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1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulphonic acid

CAS 375-73-5 · EC 206-793-1

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Also known as: 1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulphonic acid, perfluorobutane sulfonic acid (pfbs) and its salts

Part of family: PFAS (per- and polyfluoroalkyl substances)

What it is + why it's regulated

This substance is a type of PFAS chemical, often called PFBS for short. It is a man-made compound that resists grease, water, and heat, so it has been used in products like nonstick cookware, waterproof clothing, food packaging, and industrial coatings. The European Chemicals Agency (ECHA) lists PFBS and its salts on the REACH Candidate List of Substances of Very High Concern (SVHC) because it is very persistent in the environment and does not break down easily. This means it can build up in water, soil, and living things over time, raising concerns about long-term exposure. While the science is still developing, regulators take a precautionary approach to limit its release. The list helps manufacturers and importers inform customers and authorities about its presence in products. This summary draws on public regulatory data; the linked source is authoritative. Source: ECHA Candidate List of SVHC (REACH) — https://echa.europa.eu/candidate-list-table

Authoritative source

Issuing body: EU REACH SVHC Candidate List
Primary register: https://echa.europa.eu/candidate-list-table

Always verify each fact at the primary register before acting on it.

What this is NOT

ProductGuru is an INDEX of public regulatory data, not a primary source. This page is not medical, occupational-health, or legal advice. Every claim above is drawn from the issuing-agency register linked. Inclusion in our index is not endorsement, condemnation, or hazard assessment.

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