1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-4-((4-(6-methyl-7-sulfo-2-benzothiazolyl)phenyl)azo)-5-oxo-1-(4-sulfophenyl)-, trisodium salt 6442-00-8 EINECS 229-235-9 Trisodium 4,5-dihydro-4-((4-(6-methyl-7-sulphonatobenzothiazol-2-yl)phenyl)azo)-5-oxo-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate