Disodium 4-amino-3,6-bis[[4-[(2,4-dihydroxyphenyl)azo]phenyl]azo]-5-hydroxynaphthalene-2,7-disulfonate

4-amino-3,6-bis[[4-[(2,4-dihydroxyphenyl)azo]phenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonic acid disodium salt ; 2,7-naphthalenedisulfonicacid,4-amino-3,6-bis[2-[4-[2-(2,4-dihydroxyphenyl)diazenyl]phenyl]diazenyl]-5-hydroxy-,sodium salt (1:2) ; disodium 4-amino-3,6-bis[[4-[(2,4-dihydroxyphenyl)azo]phenyl]azo]-5-hydroxynaphthalene-2,7-disulphonate ; 2,7-naphthalenedisulfonicacid, 4-amino-3,6-bis[[4-[(2,4-dihydroxyphenyl)azo]phenyl]azo]-5-hydroxy-,disodium salt (9ci)