CAS 31175-20-9 appears in our catalog under these names: Nafion, Perfluorosulfonic acid-PTFE copolymer, 35-60 mesh,powder, Nafion117 solution, Tetrafluoroethylene-perfluoro(2-(2-sulfonylethoxy)propyl vinyl ether) copolymer, Perfluorosulfonic acid-PTFE copolymer ≤10um. Offered by: TRC, AmBeed, GLPBio, Biosynth. Available pack sizes: 1g, 25g, 5g, 500g, 25ml, 5ml, 2g, 50g.