tetrasodium 3,3'-[biphenyl-4,4'-diylbis(diazenediyl)]bis(5-amino-4-hydroxynaphthalene-2,7-disulfonate) [ Direct Blue 2B | Direct Blue BB | Direct Blue K | Direct Blue 6 | direct blue 6 | tetrasodium salt of 3,3'-[4,4'-biphenylylene) bis(azo]bis(5-amino-4-hydroxy-2,7-naphthalenedisulfonic acid | sodium diphenyl-4,4'-bis-azo-2'-8'-amino-1'-naphthol-3',6'-disulphonate ]
3,3'-[biphényl-4,4'-diylbis(diazényl)]bis(5-amino-4-hydroxynaphtalène-2,7-disulfonate) de tétrasodium [ Bleu Direct 6 | bleu direct 6 ]