Synonyms: 1H-Benzimidazolium,5-chloro-2-[3-[5-chloro-3-ethyl-1,3-dihydro-1-(4-sulfobutyl)-6-(trifluoromethyl)-2H-benzimidazol-2-ylidene]-1-propenyl]-3-ethyl-1-(4-sulfobutyl)-6-(trifluoromethyl)-,hydroxide, inner salt, sodium salt; 1H-Benzimidazolium,5-chloro-2-[3-[5-chloro-3-ethyl-1,3-dihydro-1-(4-sulfobutyl)-6-(trifluoromethyl)-2H-benzimidazol-2-ylidene]-1-propenyl]-3-ethyl-1-(4-sulfobutyl)-6-(trifluoromethyl)-,inner salt, sodium salt (9CI); Benzimidazolium,6-chloro-2-[3-[5-chloro-3-ethyl-1-(4-sulfobutyl)-6-(trifluoromethyl)-2-benzimidazolinylidene]propenyl]-1-ethyl-3-(4-sulfobutyl)-5-(trifluoromethyl)-,hydroxide, inner salt, sodium salt (8CI);Anhydrobis(5-chloro-3-ethyl-1-4'-sulphobutyl-6-trifluoromethyl-2-benzimidazole)trimethincyaninehydroxide, sodium salt