CAS 29658-26-2 appears in our catalog under these names: 4,4'-Difluorobenzophenone-hydroquinone copolymer, 95%, Poly(oxy-1,4-phenyleneoxy-1,4-phenylene&, 1,4-Benzenediol-4,4'-difluorobenzophenone copolymer. Offered by: AmBeed, Sigma-Aldrich, Chemat. Available pack sizes: 5g, 25g, 1g, 100G, 2.5kg, 500g.