Synonyms: hexasodium 4,4'-[1,4-phenylenebis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(2-sulphonatophenyl)azo]naphthalene-2,7-disulphonate];2,7-Naphthalenedisulfonic acid, 4,4-1,4-phenylenebisimino(6-chloro-1,3,5-triazine-4,2-diyl)iminobis5-hydroxy-6-(2-sulfophenyl)azo-, hexasodium salt;2,2'-[[1,4-Phenylenebisiminobis(4-chloro-1,3,5-triazine-2,6-diyl)bisiminobis[1-hydroxy-3,6-bis(sodiooxysulfonyl)naphthalene-8,2-diyl]bisazo]]bis(benzenesulfonic acid sodium) salt;4,4'-[1,4-Phenylenebis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(2-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid]hexasodium salt;4,4'-[1,4-Phenylenebis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino]]bis[5-hydroxy-6-[(2-sulfophenyl)azo]naphthalene-2,7-disulfonic acid trisodium] salt;2,7-Naphthalenedisulfonic acid, 4,4'-(1,4-phenylenebis(imino(6-chloro-1,3,5-triazine-4,2-diyl)imino))bis(5-hydroxy-6-(2-(2-sulfophenyl)diazenyl)-, sodium salt (1:6);4,4'-(1,4-Phenylenebis(imino(6-chloro-1,3,5-triazine-4,2-diyl)imino))bis(5-hydroxy-6-((2-sulfophenyl)azo)-2,7-naphthalenesulfonic acid, hexasodium salt;5,5'-(1,4-Phenylene)bis(imino(6-chloro-1,3,5-triazine-4,2-diyl)imino)bis(4-hydroxy-3-((2-sulfophenyl)azo)-2,7-naphthalenedisulfonic acid), hexasodium salt