3-((4-(7-((5-Chloro-2,6-difluoro-4-pyrimidinyl)amino)-5,9-disulpho-2H-naphtho(1,2-d)triazol-2-yl)-2-sulphophenyl)azo)-1,2-dihydro-6-hydroxy-2-oxoisonicotinic acid, sodium salt 4-Pyridinecarboxylic acid, 3-((4-(7-((5-chloro-2,6-difluoro-4-pyrimidinyl)amino)-5,9-disulfo-2H-naphtho(1,2-d)triazol-2-yl)-2-sulfophenyl)azo)-1,2-dihydro-6-hydroxy-2-oxo-, sodium salt 83400-20-8 EINECS 280-436-8