12217-38-8 Benzenesulfonic acid, 2,5-dichloro-4-(4-((2-((ethylphenylamino)sulfonyl)phenyl)azo)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-, sodium salt C.I. ACID YELLOW 61 EINECS 235-397-1 Sodium 2,5-dichloro-4-(4-((2-((ethylphenylamino)sulphonyl)phenyl)azo)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonate