(1,1'-Biphenyl)-3,3'-dicarboxylic acid, 4,4'-bis((5-((5-(aminosulfonyl)-2-hydroxyphenyl)azo)-1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl)azo)-, tetrasodium salt 72139-19-6 EINECS 276-375-1 Tetrasodium 4,4'-bis((5-((5-(aminosulphonyl)-2-hydroxyphenyl)azo)-1-hydroxy-6-(phenylamino)-3-sulphonato-2-naphthyl)azo)(1,1'-biphenyl)-3,3'-dicarboxylate