Pentanoic acid, 4,4-bis[(γ-ω-perfluoro-C8-20-alkyl)thio] derivs.

Manufactured PFAS additive for textiles, leather, paper/packaging, and industrial coatings; it can also be used in specialty surfactants. Releases occur during production, product use, and disposal [2][3].

Drinking water near PFAS plants, airports/firefighting sites; indoor dust from treated carpets/upholstery; food contact materials; and workplace air/skin contact in finishing, plating, or fluorochemical jobs [1][2].

Data on this exact compound are limited, but similar long‑chain PFAS have been linked to higher cholesterol, reduced vaccine response, liver effects, and developmental harms; some (e.g., PFOA) cause cancer [1][4][5].

People using private wells near sources, communities near manufacturing or training sites, workers handling PFAS, pregnant people, and infants fed contaminated formula or breast milk [1][2].

If on a private well, test for PFAS; use activated carbon or reverse‑osmosis filters. Limit stain‑resistant treatments and grease‑resistant packaging, wet‑dust/HEPA vacuum, follow fish advisories, and use workplace PPE/hygiene [1][2].