... D821 4, CAS NO.5538-94-3 Disoctyl Dimethyl Ammonium Chloride / D821 / 5538-94-3 NamerDisoctyl Dimethyl Ammonium ChlorideOther ... NamerDioctyl Dimethyl Ammonium Chloride, D821, classifyquaternary ammonium saltTypeRJ-D821CAS No.5538-94-3MF ... fabric softener.2, Disinfectant, Germicide. Disoctyl Dimethyl Ammonium Chloride / D821 / 5538-94-3