1,7-Naphthalenedisulfonic acid, 4-((5-chloro-2-fluoro-6-methyl-4-pyrimidinyl)amino)-5-hydroxy-6-((2-sulfophenyl)azo)-, trisodium salt 4-((5-Chloro-2-fluoro-4-methylpyrimidin-6-yl)amino)-5-hydroxy-6-((2-sulfophenyl)azo)-1,7-naphthalenedisulfonic acid, trisodium salt 75198-87-7