Synonyms: 1-[2-[p-[[2,6-Dichloro-4-(dimethylsulfamoyl)phenyl]azo]-N-ethylanilino]ethyl]pyridiniumchloride (7CI); Pyridinium,1-[2-[[4-[[2,6-dichloro-4-[(dimethylamino)sulfonyl]phenyl]azo]phenyl]ethylamino]ethyl]-,chloride (9CI); Pyridinium, 1-[2-[p-[[2,6-dichloro-4-(dimethylsulfamoyl)phenyl]azo]-N-ethylanilino]ethyl]-,chloride (8CI);1-[2-[[4-[[2,6-Dichloro-4-[(dimethylamino)sulfonyl]phenyl]azo]phenyl]ethylamino]ethyl]pyridiniumchloride