2,7-Naphthalenedisulfonic acid, 5-((5-chloro-2-fluoro-6-methyl-4-pyrimidinyl)amino)-4-hydroxy-3-((1-sulfo-2-naphthalenyl)azo)-, trisodium salt 4-((5-Chloro-2-fluoro-4-methylpyrimidin-6-yl)amino)-5-hydroxy-6-((1-sulfonaphthalen-2-yl)azo)-2,7-naphthalenedisulfonic acid, trisodium salt 75198-90-2