1H-Pyrazole, 1-(2,5-dichloro-4-sulfophenyl)-5-oxo-3-methyl-4-((3-((ethylphenylamino)sulfonyl)-4-methylphenyl)azo)-4,5-dihydro-, sodium salt 71873-38-6 93963-71-4 Benzenesulfonic acid, 2,5-dichloro-4-(4-((3-((ethylphenylamino)sulfonyl)-4-methylphenyl)azo)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-, sodium salt EINECS 276-114-1 Sodium 2,5-dichloro-4-(4-((3-((ethylphenylamino)sulphonyl)-p-tolyl)azo)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonate