Synonyms: 1-Naphthol-3-sulfonicacid, 6-[(4,6-dichloro-s-triazin-2-yl)amino]-2-(o-sulfophenylazo)- (6CI);2-Naphthalenesulfonic acid,7-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-[(2-sulfophenyl)azo]-(9CI);2-Naphthalenesulfonic acid,7-[(4,6-dichloro-s-triazin-2-yl)amino]-4-hydroxy-3-[(o-sulfophenyl)azo]- (7CI);C.I. Reactive Orange 1 (8CI);