Direct Blue 218

c.i. direct blue 218 ; tetrasodium [mu-[[3,3'-[(3,3'-dihydroxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[5-amino-4-hydroxynaphthalene-2,7-disulphonato]](8-)]]dicuprate(4-) ; cuprate(4-), [m-[[3,3'-[(3,3'-dihydroxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[5-amino-4-hydroxy-2,7-naphthalenedisulfonato]](8-)]]di-,tetrasodium ; 1-naphthol-3,6-disulfonicacid, 2,2'-(3,3'-dihydroxy-4,4'-biphenylylenebisazo)bis[8-amino-, dicopperderiv., tetrasodium salt (6ci) ; pontamine bond blue b ; cuprate(4-), [m-[[3,3'-[[3,3'-di(hydroxy-ko)[1,1'-biphenyl]-4,4'-diyl]bis(azo-kn1)]bis[5-amino-4-(hydroxy-ko)-2,7-naphthalenedisulfonato]](8-)]]di-, tetrasodium(9ci) ; [3,3'-[(3,3'-dihydroxy-1,1'-biphenyl-4,4'-diyl)bis(azo)bis(5-amino-2,7-naphthalenedisulfonato-(o4,o3)]]dicopper, tetrasodium salt ; direct blue 218 ; cuprate(4-) ['-[[3,3'-[(3,3'-dihydroxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[5-amino-4-hydroxy-2,7-naphthalenedisulfonato]](8-)]]di-, tetrasodium ; c.i. direct blue 218 (8ci) ; c.i. 24401 ; pontaminefast blue 7gln ; copper,[tetrahydrogen-3,3'-[(3,3'-dihydroxy-4,4'-biphenylylene)bis(azo)]bis[5-amino-4-hydroxy-2,7-naphthalenedisulfonato](4-)]di-,tetrasodium salt (7ci) ; carta blue vp ; cuprate(4-), .mu.-3,3-3,3-di(hydroxy-.kappa.o)1,1-biphenyl-4,4-diylbis(azo-.kappa.n1)bis5-amino-4-(hydroxy-.kappa.o)-2,7-naphthalenedisulfonato(8-)di-, tetrasodium ; cuprate, ['-[[3,3'-[(3,3'-dihydroxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[5-amino-4-hydroxy-2,7-naphthalenedisulfonato]]]]di-, tetrasodium ; amanil supra blue 9gl ; cuprate(4-), [m-[[3,3'-[[3,3'-di(hydroxy-ko)[1,1'-biphenyl]-4,4'-diyl]bis(2,1-diazenediyl-kn1)]bis[5-amino-4-(hydroxy-ko)-2,7-naphthalenedisulfonato]](8-)]]di-,sodium (1:4) ; tetrasodium ['-[[3,3'-[(3,3'-dihydroxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis [5-amino-4-hydroxynaphthalene-2,7-disulphonato]](8-)]]dicuprate ; direct blue218 ; direct blue 218 (c.i. 24401) ; intralite blue 8gll ; fastusol blue 9glp