Fatty acids, C7-13, perfluoro, ammonium salts

This is a toxic group of PFAS (per- and polyfluoroalkyl substances) made of C7–C13 perfluoroalkyl carboxylate ammonium salts, including chemicals like PFOA and PFNA. Used to make nonstick, stain- and water-resistant products and fluoropolymers, they persist in the environment and can build up in people [1][2].

Where It Comes From

Releases from making/using fluoropolymers and related industries, contaminated waste sites, and wastewater; PFAS travel in groundwater and surface water [1][2].

How You Are Exposed

Mainly by drinking contaminated water; also through food (especially fish), indoor dust, and some workplaces [1][2][3].

Why It Matters

Linked to increased cholesterol, liver effects, reduced vaccine response, pregnancy-induced hypertension, and developmental effects. PFOA (a component) is classified by IARC as carcinogenic to humans, with links to kidney and testicular cancer [1][4].

Who Is at Risk

Workers handling fluoropolymers/PFAS; people living near contaminated water or waste sites; pregnant people, fetuses, infants, and children [1][3].

How to Lower Your Exposure

Test private wells for PFAS; use certified filters (activated carbon or reverse osmosis) labeled for PFAS reduction; follow local fish advisories; damp-dust and use a HEPA vacuum; avoid PFAS-treated products when feasible [2][3].

References

[1]ATSDR. Toxicological Profile for Perfluoroalkyls (PFAS), 2021.
[2]U.S. EPA. PFAS Explained.
[3]CDC/ATSDR. PFAS and Your Health: Exposure and Reducing Risk.
[4]IARC Monographs Vol. 135 (2023): Perfluorooctanoic acid (PFOA).