Synonyms: 1,4-Benzenedisulfonic acid, 2-(2-(6-((5-chloro-2,6-difluoro-4-pyrimidinyl)amino)-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl)-5-methyl-, sodium salt (1:3);1,4-Benzenedisulfonic acid, 2-((6-((5-chloro-2,6-difluoro-4-pyrimidinyl)amino)-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-5-methyl-, trisodium salt;Trisodium 2-((6-((5-chloro-2,6-difluoropyrimidin-4-yl)amino)-1-hydroxy-3-sulphonato-2-naphthyl)azo)toluene-2,5-disulphonate;trisodium 2-[(2Z)-2-{6-[(5-chloro-2,6-difluoropyrimidin-4-yl)amino]-1-oxo-3-sulfonatonaphthalen-2(1H)-ylidene}hydrazinyl]-5-methylbenzene-1,4-disulfonate