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CAS 29420-49-3

Potassium perfluorobutane sulfonate

Potassium PFBS is a short‑chain PFAS used in industry and some consumer treatments; it does not break down easily in the environment. In water it becomes PFBS, which most health studies address [1].

Where It Comes From

PFOS replacement in textiles/leather/paper treatments, cleaning products, and metal‑plating mist suppressants; releases from manufacturing and products can reach water [1][2].

How You Are Exposed

Drinking contaminated water, eating affected fish/food, indoor dust and treated goods, and workplace contact where PFAS are used [1][3].

Why It Matters

Less bioaccumulative than long‑chain PFAS but can affect thyroid hormones, kidneys, and development; EPA’s lifetime drinking‑water health advisory for PFBS is 2,000 ng/L [1][2].

Who Is at Risk

People on PFAS‑impacted private wells, PFAS‑using workers, pregnant people and infants, and those with thyroid or kidney disease [1][3].

How to Lower Your Exposure

Test well water; use certified activated carbon or reverse‑osmosis filters (NSF/ANSI 53 or 58); follow fish advisories; choose PFAS‑free products; wet‑dust/vacuum; follow workplace protections [2][3].

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