1-(3-((4-Chloro-6-((3-sulfophenyl)amino)-1,3,5-triazin-2-yl)amino)-2-methyl-5-sulfophenyl)-4-((5-((4-chloro-6-((3-sulfophenyl)amino)-1,3,5-triazin-2-yl)amino)-2-sulfophenyl)azo)-4,5-dihydro-5-oxo-1H-pyrazole-3-carboxylic acid, tetrasodium salt 1H-Pyrazole-3-carboxylic acid, 1-(3-((4-chloro-6-((3-sulfophenyl)amino)-1,3,5-triazin-2-yl)amino)-2-methyl-5-sulfophenyl)-4-((5-((4-chloro-6-((3-sulfophenyl)amino)-1,3,5-triazin-2-yl)amino)-2-sulfophenyl)azo)-4,5-dihydro-5-oxo-, tetrasodium salt 72102-68-2