Synonyms: Butanamide,2,2'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[N-(4-ethoxyphenyl)-3-oxo-(9CI);p-Acetoacetophenetidide,2,2''-[(3,3'-dichloro-4,4'-biphenylylene)bis(azo)]bis- (8CI);C.I. 21111;C.I.Pigment Yellow 134;C.I. Pigment Yellow 152;Pigment Yellow 134;Pigment Yellow152;