Synonyms: 1H-Benzimidazolium,6-chloro-4-[[4-[(2-cyanoethyl)ethylamino]phenyl]azo]-1,3-dimethyl-, chloride(9CI); Benzimidazolium,6-chloro-4-[[p-[(2-cyanoethyl)ethylamino]phenyl]azo]-1,3-dimethyl-, chloride(8CI);6-Chloro-4-[p-[N-(2-cyanoethyl)-N-ethylamino]phenylazo]-1,3-dimethylbenzimidazoliumchloride