68227-65-6 Benzoic acid, 2-((1-(4-(2-(4-amino-2-sulfophenyl)ethenyl)-3-sulfophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)-, disodium salt Disodium hydrogen 2-((1-(4-(2-(4-amino-2-sulphonatophenyl)vinyl)-3-sulphonatophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl)azo)benzoate EINECS 269-376-3