Synonyms: Acetoacetanilide,2,2'-[(3,3'-dimethoxy-4,4'-biphenylylene)bis(azo)]bis[4'-chloro- (8CI);Butanamide,2,2'-[(3,3'-dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[N-(4-chlorophenyl)-3-oxo-(9CI); C.I. 21162; C.I. Pigment Orange 44; Pigment Orange 44