Synonyms: 4,4'-Bi[2-methoxybenzenediazoniumchloride] (6CI,7CI); 4,4'-Biphenylbis(diazonium), 3,3'-dimethoxy-, dichloride(8CI); [1,1'-Biphenyl]-4,4'-bis(diazonium), 3,3'-dimethoxy-, dichloride (9CI);Blue BNS salt; Diazo Blue B; o-Dianisidinetetrazonium chloride