2 3 5 6 tetrafluorophenol cas no July 8, 2019 16 32 64 128 2 3 5 6-tetrafluoroterephthalic acid 2 3 5 6-tetrafluorobenzoic acid 2 6-difluorophenol 2-(2 2 2-trifluoroethoxy)phenol 2 3 5 6-tetrachlorophenol
