Synonyms: 16143-79-6;copper(2+) sodium 6,6'-[(3,3'-dioxidobiphenyl-4,4'-diyl)di(e)diazene-2,1-diyl]bis(4-amino-5-oxidonaphthalene-1,3-disulfonate)(2:4:1);EINECS 240-298-1;AC1L4OXJ;AR-1I2677;AR-1I2678;C.I. Direct Blue 76, tetrasodium salt;12237-59-1;1325-28-6;50814-30-7;Cuprate(4-), (mu-((6,6'-((3,3'-di(hydroxy-kappaO)(1,1'-biphenyl)-4,4'-diyl)bis(2,1-diazenediyl-kappaN1))bis(4-amino-5-(hydroxy-kappaO)-1,3-naphthalenedisulfonato))(8-)))di-, sodium (1:4);Cuprate(4-), (mu-((6,6'-((3,3'-di(hydroxy-kappaO)(1,1'-biphenyl)-4,4'-diyl)bis(azo-kappaN1))bis(4-amino-5-(hydroxy-kappaO)-1,3-naphthalenedisulfonato))(8-)))di-, tetrasodium;Cuprate(4-), (mu-((6,6'-((3,3'-dihydroxy(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(4-amino-5-hydroxy-1,3-naphthalenedisulfonato))(8-)))di-, tetrasodium;Cuprate(4-), [?-[[6,6'-[(3,3'-dihydroxy[ 1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[4-amino -5-hydroxy-1,3-naphthalenedisulfonato]](8-)]]di-, tetrasodium;dicopper tetrasodium 4-amino-6-[[4-[4-[(8-amino-1-oxido-5,7-disulfonatonaphthalen-2-yl)diazenyl]-3-oxidophenyl]-2-oxidophenyl]diazenyl]-5-oxidonaphthalene-1,3-disulfonate;Tetrasodium (mu-((6,6'-((3,3'-dihydroxy(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(4-amino-5-hydroxynaphthalene-1,3-disulphonato))(8-)))dicuprate(4-)