Pyridinium, 1-(3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl)-, salt with 4-methylbenzenesulfonic acid (1:1)

Industrial surfactant for water/oil‑repellent coatings (textiles, paper), metal plating, and electronics; releases from treated products [1][2].

Contaminated drinking water near facilities or fire‑training areas; indoor dust; some foods/packaging; workplace air or skin contact [1][2].

PFAS persist and can build up in people; studies link some to reduced vaccine response, higher cholesterol, liver and developmental effects, and certain cancers (e.g., PFOA) [1][3][4].

Workers handling PFAS; households on private wells near sources; pregnant people, infants, and children; high consumers of fish/shellfish from affected waters [1][2].

Check local water reports; consider certified filters (activated carbon or reverse osmosis) for PFAS; choose PFAS‑free stain‑/water‑repellent products and packaging; clean indoor dust regularly; follow workplace hygiene and PPE [1][2].