Synonyms: 1H-Benzimidazolium,5-cyano-2-[3-(5-cyano-1,3-diethyl-1,3-dihydro-2H-benzimidazol-2-ylidene)-1-propenyl]-1-ethyl-3-(4-sulfobutyl)-,inner salt (9CI); Benzimidazolium,5-cyano-2-[3-(5-cyano-1,3-diethyl-2-benzimidazolinylidene)propenyl]-1-ethyl-3-(4-sulfobutyl)-,hydroxide, inner salt (8CI); Sensitizer