1H-Pyrazole-3-carboxylic acid, 4-((5-(((2,3-dichloro-6-quinoxalinyl)carbonyl)amino)-2-sulfophenyl)azo)-4,5-dihydro-1-(2-methyl-4-sulfophenyl)-5-oxo-, trisodium salt 3-Carboxy-4-((5-(((2,3-dichloroquinoxalin-6-yl)carbonyl)amino)-2-sulfophenyl)azo)-1-(2-methyl-4-sulfophenyl)-5-oxo-1H-pyrazole, trisodium salt 72139-14-1 EINECS 276-370-4 Trisodium 4-((5-(((2,3-dichloro-6-quinoxalinyl)carbonyl)amino)-2-sulphonatophenyl)azo)-4,5-dihydro-1-(2-methyl-4-sulphonatophenyl)-5-oxo-1H-pyrazole-3-carboxylate