2,5-Dimethyl-3-(3-sulfopropyl)benzoxazolium, hydroxide, inner salt 2,5-Dimethyl-3-(3-sulphonatopropyl)benzoxazolium 70615-15-5 Benzoxazolium, 2,5-dimethyl-3-(3-sulfopropyl)-, inner salt EINECS 274-698-2