Per- and polyfluoroalkyl substances (PFAS)

Layer 2 — Chemistryin the environmental-chemistry subtree

Long-chain PFAS (PFOS / PFOA) — persistent, bioaccumulative, toxic 'forever chemicals'. Used in firefighting foam, non-stick cookware, food-packaging. C-F bond breaks slowly; global background contamination. EPA MCL 4 ppt (2024); EU…

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