1-Naphthalenesulfonic acid, 6-amino-5-((4-((5-chloro-2,6-difluoro-4-pyrimidinyl)amino)-2-sulfophenyl)azo)-4-hydroxy-, sodium salt 6-Amino-5-((5-((5-chloro-2,6-difluoropyrimidin-4-yl)amino)-2-sulfophenyl)azo)-4-hydroxynaphthalene-1-sulfonic acid, sodium salt 73003-61-9