Synonyms: 1,3-Naphthalenedisulfonicacid,6,6'-[(3,3'-dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[4-amino-5-hydroxy-,tetrasodium salt (9CI); C.I. Direct Blue 1, tetrasodium salt (8CI); ChicagoBlue 6B (6CI); Airedale Blue FFD; Amanil Sky Blue 6B; Amanil Sky Blue FF; AtlanticResin Fast Blue LLGG; Atlantic Sky Blue 6B; Atlantic Sky Blue FF; Atul DirectSky Blue FB; Azine Brilliant Blue 6B; Azocard Blue 6B; Belamine Sky Blue FF;Benzanil Sky Blue FF; Benzo Brilliant Blue 6BS; Brasilamina Sky Blue 6B;Brilliant Benzo Blue; Brilliant Benzo Blue 6BA-CF; Brilliant blue 6B; C.I.24410; C.I. Direct Blue 1; Calcodur Blue 6GFL; Calcodur Resin Fast Blue 6G;Calcomine Sky Blue FF; Chicago Blue; Chicago Sky Blue; Chicago Sky Blue 6B;Chloramine Sky Blue FF; Chlorantine Fast Blue B 5GL; Chlorazol Sky Blue FF;Chrome Leather Sky Blue GS; Cresotine Blue 6B; Diacotton Sky Blue 6B;Diaphtamine Blue BS; Diazine Sky Blue FF; Diazol Pure Blue 6B; DiphenylBrilliant Blue FF; Direct Azure Blue 6B; Direct Blue 1; Direct Blue 6B; DirectBlue 6BS; Direct Blue FF; Direct Bright Blue; Direct Brilliant Blue FF; DirectBrilliant Blue MFF; Direct Brilliant Sky Blue 6B; Direct Pure Blue 6B; DirectPure Blue FF; Direct Pure Sky Blue; Direct Sky Blue 6B; Direct Sky Blue 6BS;Direct Sky Blue 6D; Direct Sky Blue FF; Direct Sky Blue GS; Direct Sky BlueGreen Shade; Enianil Brilliant Blue FF; Fastusol Brilliant Blue L 8GU; FenaminSky Blue 3F; Fixanol Sky Blue FF; Hispamin Sky Blue 6B; Incomine Sky Blue 6B;Ink Blue 6B; Japanol Brilliant Blue 6BKX; Kayaku Direct Sky Blue 6B; MitsuiDirect Brilliant Blue 6B; NCI 9617; Naphtamine Sky Blue DD; Niagara Blue 6B;Niagara Sky Blue 6B; Nyanza Sky Blue 6B; Orbamin Brilliant Blue FF; Oxamine SkyBlue 6B; Paper Blue 6B; Paramine Sky Blue FF; Phenamine Brilliant Blue 6B; PhenoSky Blue 6BX; Pontamine Sky Blue; Pontamine Sky Blue 6BX; Pontamine Sky Blue6BX Greenish; Pure Blue; Pure Sky Blue 6B; Pyrazol Blue 2F; Pyrazol FastBrilliant Blue VP; Shikiso Direct Sky Blue 6B; Sirius Supra Blue 4G;