56670-26-9 Benzenesulfonic acid, 4-(4-((4-((4-((4,5-dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-1H-pyrazol-4-yl)azo)benzoyl)amino)phenyl)azo)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)- EINECS 260-326-6 p-(4-((4-((4-((4,5-Dihydro-3-methyl-5-oxo-1-(4-sulphophenyl)-1H-pyrazol-4-yl)azo)benzoyl)amino)phenyl)azo)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonic acid