1H-Benzimidazolium, 1,2-dimethyl-3-(3-sulfopropyl)-5-(trifluoromethyl)-, hydroxide, inner salt 1H-Benzimidazolium, 1,2-dimethyl-3-(3-sulfopropyl)-5-(trifluoromethyl)-, inner salt 63815-85-0 63870-53-1