Synonyms: 2,7-Naphthalenedisulfonic acid, 4-amino-3,6-bis[[5-[[4-chloro- 6-[(2-hydroxyethyl)amino]-1,3,5-triazin-2-yl ]amino]-2-sulfophenyl]azo]-5-hydroxy-, tetrasodium salt;tetrasodium 4-amino-3,6-bis(5-[4-chloro-6-(2-hydroxyethylamino)-1,3,5-triazin-2-ylamino]-2-sulfonatophenylazo)-5-hydroxynaphthalene-2,7-disulfonate;4-Amino-3,6-bis[[5-[[4-chloro-6-[(2-hydroxyethyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonic acid tetrasodium salt;4-Amino-3,6-bis[5-[4-chloro-6-(2-hydroxyethylamino)-1,3,5-triazin-2-ylamino]-2-sulfophenylazo]-5-hydroxy-2,7-naphthalenedisulfonic acid tetrasodium salt