2,5-Dichloro-4-(4,5-dihydro-3-methyl-4-((4-(((4-methylphenyl)sulfonyl)oxy)phenyl)azo)-5-oxo-1H-pyrazol-1-yl)benzenesulfonic acid, monosodium salt 2-Pyrazolin-5-one, 1-(2,5-dichloro-4-sulfophenyl)-3-methyl-4-((4((p-toluenesulfonyl)oxy)phenyl)azo)-, sodium salt 67923-65-3 Benzenesulfonic acid, 2,5-dichloro-4-(4,5-dihydro-3-methyl-4-((4-(((4-methylphenyl)sulfonyl)oxy)phenyl)azo)-5-oxo-1H-pyrazol-1-yl)-, sodium salt EINECS 267-782-5 Sodium 2,5-dichloro-4-(4,5-dihydro-3-methyl-4-((4-((p-tolylsulphonyl)oxy)phenyl)azo)-5-oxo-1H-pyrazol-1-yl)benzenesulphonate