2 6-difluorophenol July 8, 2019 16 32 64 128 2 6-difluoro phenol pka 2 6-difluorophenol cas 2 6 difluorophenol cas no 4 amino 2 6 difluorophenol 2 3-difluorophenol 2 6-diethylphenol 2 6-dichlorphenol