68959-19-3 EINECS 273-402-9 Ethanesulfonic acid, 2-(((2,5-dichloro-4-((2-methyl-1H-indol-3-yl)azo)phenyl)sulfonyl)amino)-, monosodium salt N-(2-Sulfoethyl)-2,5-dichloro-4-(3-(2-methyl-1H-indolyl)azo)benzenesulfonamide, sodium salt Sodium 2-(((2,5-dichloro-4-((2-methyl-1H-indol-3-yl)azo)phenyl)sulphonyl)amino)ethanesulphonate