6359-96-2 Benzenesulfonic acid, 3-((1-(3-chlorophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)-2-hydroxy-5-nitro-, monosodium salt EINECS 228-816-4 Sodium 3-((1-(3-chlorophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)-2-hydroxy-5-nitrobenzenesulphonate