AAAS EPI Center and GLLC Roundtables

Branches of the PFAS family tree

Non-polymers

Polymers

Legacy PFAS  Long-chain PFAS  Examples: PFOS, PFOA (8 carbons)  Manufacturing phased out in U.S. and Europe Current-use PFAS  Short-chain and other PFAS  Examples: GenX, PFBS  Used as replacements for legacy PFAS

 Very long carbon chains  Example: Teflon  Not readily absorbed by cells  Created from smaller building blocks

P F A S

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Teflon (PTFE)

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