1H-Pyrazole-3-carboxylic acid, 4-((5-((5-chloro-2-fluoro-6-methyl-4-pyrimidinyl)amino)-2-sulfophenyl)azo)-1-(2,5-disulfophenyl)-4,5-dihydro-5-oxo-, tetrasodium salt 3-Carboxy-4-((5-((5-chloro-2-fluoro-4-methylpyrimidin-6-yl)amino)-2-sulfophenyl)azo)-5-oxo-1-(2,5-disulfophenyl)-1H-pyrazol-2-ine, tetrasodium salt 75198-85-5