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