5-Chloro-2-methyl-3-(3-sulphonatopropyl)benzoxazolium 51981-33-0 Benzoxazolium, 5-chloro-2-methyl-3-(3-sulfopropyl)-, hydroxide, inner salt Benzoxazolium, 5-chloro-2-methyl-3-(3-sulfopropyl)-, inner salt EINECS 257-574-2