2-Methyl-3-(3-sulphonatopropyl)benzothiazolium 2-Methyl-3-(gamma-sulfopropyl)benzothiazolium hydroxide inner salt 56405-37-9 Benzothiazolium, 2-methyl-3-(3-sulfopropyl)-, hydroxide, inner salt Benzothiazolium, 2-methyl-3-(3-sulfopropyl)-, inner salt EINECS 260-157-8