GenX

TL;DR

something.

A PFAS.

For decades, DuPont used perfluorooctanoic acid (PFOA, or C8) during production of PTFE, later discontinuing its use due to legal actions over ecotoxicological and health effects of exposure to PFOA. Dupont's spin-off Chemours today manufactures PTFE using an alternative chemical it calls GenX, another PFAS. Although GenX was designed to be less persistent in the environment compared to PFOA, it has proven to be a "regrettable substitute".[8] Its effects may be equally harmful or even more detrimental than those of the chemical it was meant to replace.[8][9][10]