68134-58-7 Benzenemethanaminium, N,N-dimethyl-3-sulfo-N-(3-sulfophenyl)-, hydroxide, inner salt, calcium salt Benzenemethanaminium, N,N-dimethyl-3-sulfo-N-(3-sulfophenyl)-, inner salt, calcium salt Bis(dimethyl(3-sulfophenyl)(3-sulfobenzyl)ammonium) calcium salt Dihydrogen bis(dimethyl(3-sulphonatobenzyl)(3-sulphonatophenyl)ammonium), calcium salt EINECS 268-754-5