Synonyms: 2,7-Naphthalenedisulfonic acid, 4-((3-((3-(4,5-dihydro-3-methyl-5-oxo-4-((4-sulfophenyl)azo)-1H-pyrazol-1-yl)phenyl)azo)-2,4-dihydroxyphenyl)azo)-5-hydroxy-6-(phenylazo)-;2,7-Naphthalenedisulfonic acid, 5-(2-(3-(2-(3-(4,5-dihydro-3-methyl-5-oxo-4-(2-(4-sulfophenyl)diazenyl)-1H-pyrazol-1-yl)phenyl)diazenyl)-2,4-dihydroxyphenyl)diazenyl)-4-hydroxy-3-(2-phenyldiazenyl)-;68134-18-9