4,4'-Biphenylenebis(3-oxopropylene)bis(dimethyl(2-hydroxyethyl)ammonium) dibromide 77967-05-6 AMMONIUM, 4,4'-BIPHENYLENEBIS(3-OXOPROPYLENE)BIS(DIMETHYL(2-HYDROXYETHYL)-, DIBR Ammonium, 4,4'-biphenylenebis(3-oxopropylene)bis(dimethyl(2-hydroxyethyl)-, dibromide