Synonyms: 1-Naphthol-3,6-disulfonicacid, 8-[(4,6-dichloro-s-triazin-2-yl)amino]-2-phenylazo- (6CI);2,7-Naphthalenedisulfonic acid,5-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-(phenylazo)- (9CI);2,7-Naphthalenedisulfonic acid,5-[(4,6-dichloro-s-triazin-2-yl)amino]-4-hydroxy-3-(phenylazo)- (7CI,8CI)