3-((5-((4-(((4-((4,5-Dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)phenyl)amino)carbonyl)phenyl)azo)-2,4-dihydroxyphenyl)azo)-4-hydroxybenzenesulphonic acid 84963-11-1 EINECS 284-812-2