Synonyms: 1H-Benzimidazolium, 6-chloro-4-(2-(4-(ethyl(2-hydroxyethyl)amino)-2-methylphenyl)diazenyl)-1,3-dimethyl-, chloride (1:1);1H-Benzimidazolium, 6-chloro-4-((4-(ethyl(2-hydroxyethyl)amino)-2-methylphenyl)azo)-1,3-dimethyl-, chloride;5-Chloro-7-((4-(ethyl(2-hydroxyethyl)amino)-2-benzyl)azo)-1,3-dimethyl-1H-benzimidazolium chloride;4-chloro-7-[(E)-{4-[ethyl(2-hydroxyethyl)amino]-2-methylphenyl}diazenyl]-1,3-dimethyl-1H-3,1-benzimidazol-3-ium chloride