70815-09-7 Benzenesulfonic acid, 2,5-dichloro-4-(3-methyl-4-((2-methyl-4-sulfophenyl)azo)-5-oxo-2-pyrazolin-1-yl)-, disodium salt Benzenesulfonic acid, 2,5-dichloro-4-(4,5-dihydro-3-methyl-4-((2-methyl-4-sulfophenyl)azo)-5-oxo-1H-pyrazol-1-yl)-, disodium salt Disodium 2,5-dichloro-4-(4,5-dihydro-3-methyl-5-oxo-4-((4-sulphonato-o-tolyl)azo)-1H-pyrazol-1-yl)benzenesulphonate EINECS 274-906-1