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CAS 68259-08-5

1-Hexanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,6-tridecafluoro-, ammonium salt

This is the ammonium salt of PFHxS, a “forever chemical” (PFAS) used in firefighting foam and stain- or water‑resistant coatings. It persists in the environment and can build up in people over years [1][3].

Where It Comes From

Aqueous film‑forming foams (AFFF), treated textiles/carpets, paper/packaging, metal plating; releases from factories, airports, military sites, and landfills/wastewater [1][3].

How You Are Exposed

Drinking contaminated water, eating contaminated fish/food, indoor dust from treated products, and workplace air or contact in PFAS-related jobs [1][2][3].

Why It Matters

PFHxS stays in the body for years and is linked to higher cholesterol, changes in liver and thyroid hormones, reduced vaccine response, and effects during pregnancy and development [1][3].

Who Is at Risk

People near contaminated water sources (e.g., around airports/bases or PFAS manufacturers), workers using AFFF or PFAS, pregnant people, infants, and young children [1][2][3].

How to Lower Your Exposure

Check local water results; use certified filters (NSF/ANSI 53 or 58) or alternate water; follow fish advisories; reduce use of stain‑/water‑resistant products; wet‑clean and HEPA‑vacuum dust [2][4][5].

References

  1. [1]ATSDR. Toxicological Profile for Perfluoroalkyls (incl. PFHxS). 2021.
  2. [2]ATSDR/CDC. PFAS and Your Health: Information for Communities. 2022–2024.
  3. [3]EPA. Toxicity Assessment for PFHxS and Related Salts/Precursors. 2023.
  4. [4]EPA. Final National Primary Drinking Water Regulation for PFAS. 2024.
  5. [5]EPA. Drinking Water Treatment Technologies for PFAS (granular activated carbon, RO). 2023.

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