Synonyms: Aceticacid,2,2'-[[4,4'-bis[[1-hydroxy-6-[(4-methoxyphenyl)amino]-3-sulfo-2-naphthalenyl]azo][1,1'-biphenyl]-3,3'-diyl]bis(oxy)]bis-,tetrasodium salt (9CI); Benzo Cuprol Blue FBL (6CI); C.I. Direct Blue 158,tetrasodium salt (8CI); Benzo Fast Copper Blue FBL; Benzo Fast Copper BlueFBLA-CF; C.I. 24555; C.I. Direct Blue 158; Coprantine Pure Blue 2RLL;Cuprodiazol Light Blue NL; Cuprofix Blue CFBL; Derma Fast Blue CW-4R; DirectBlue 158; Direct Lightfast Pure Blue 2KU; Durazol Copper Blue FB; Resofix BlueC2RL