6359-88-2 Benzenesulfonic acid, 4-(4,5-dihydro-3-methyl-4-((4-(((4-methylphenyl)sulfonyl)oxy)phenyl)azo)-5-oxo-1H-pyrazol-1-yl)-, sodium salt EINECS 228-812-2 Sodium 5-hydroxy-3-methyl-4-((4-((4-methylphenyl)sulphonyloxy)phenylazo)-1H-pyrazol-1-yl)benzenesulphonate