1,5-Naphthalenedisulfonic acid, 2-((6-((5-chloro-2,6-difluoro-4-pyrimidinyl)amino)-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-, trisodium salt 7-((5-Chloro-2,4-difluoro-6-pyrimidyl)amino)-4-hydroxy-3-((1,5-disulfo-2-naphthyl)azo)-2-naphthalenesulfonic acid, trisodium salt 7-((5-Chloro-2,4-difluoropyrimidin-6-yl)amino)-4-hydroxy-3-((1,5-disulfonaphthalen-2-yl)azo)-2-naphthalenesulfonic acid, trisodium salt 72828-73-0