68959-04-6 Benzenesulfonic acid, 2-((4-((3-methyl-4-(((4-methylphenyl)sulfonyl)oxy)phenyl)azo)phenyl)amino)-5-nitro-, monopotassium salt EINECS 273-390-5 Potassium 2-(4-((3-methyl-4-(((p-tolyl)sulphonyl)oxy)phenyl)azo)anilino)-5-nitrobenzenesulphonate