Synonyms: 1,3-Naphthalenedisulfonicacid,6,6'-[(3,3'-dimethyl[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[4-amino-5-hydroxy-,tetrasodium salt (9CI); Azovan Blue (6CI); C.I. Direct Blue 53, tetrasodiumsalt (8CI); 4,4'-Bis[7-(1-amino-8-hydroxy-2,4-disulfo)naphthylazo]-3,3'-bitolyltetrasodium salt; C.I. 23860; C.I. Direct Blue 53; Diazol Pure Blue BF; DirectBlue 53; Evans Blue; Evan's Blue; T 1824