12220-54-1 52584-47-1 Acid Yellow 72 Benzenesulfonic acid, 2,5-dichloro-4-(4-((4-dodecylphenyl)azo)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-, sodium salt EINECS 258-026-5 Sodium 2,5-dichloro-4-(4-((4-dodecylphenyl)azo)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonate