Synonyms: [1,1'-Biphenyl]-3,3'-dicarboxylic acid, 4-[[4,5-dihydro-3-methyl-5-oxo-1-(6-sulfo-2-naphthalenyl)-1H-pyrazol-4-yl]azo]-4'-[[1-[[(2-methoxyphenyl)amino]carbonyl]-2-oxopropyl]azo]-, potassium sodium salt;(1,1'-Biphenyl)-3,3'-dicarboxylic acid, 4-((4,5-dihydro-3-methyl-5-oxo-1-(6-sulfo-2-naphthalenyl)-1H-pyrazol-4-yl)azo)-4'-((1-(((2-methoxyphenyl)amino)carbonyl)-2-oxopropyl)azo)-, potassium sodium salt;Einecs 282-159-8