Synonyms: Copper,4,4'-bis[(8-amino-1-hydroxy-5,7-disulfo-2-naphthalenyl)azo][1,1'-biphenyl]-3,3'-dicarboxylicacid complex (9CI); [1,1'-Biphenyl]-3,3'-dicarboxylic acid,4,4'-bis[(8-amino-1-hydroxy-5,7-disulfo-2-naphthalenyl)azo]-, copper complex(9CI); Direct Blue 226; Direct Fast Blue 2ZM; Direct Lightfast Blue 2ZM; DirectLightfast Sky Blue 2ZM; Sirius Supra Blue 3G