Synonyms: Benzothiazolium,5-methyl-2-[2-[[5-methyl-3-(3-sulfopropyl)-2(3H)-benzothiazolylidene]methyl]-1-butenyl]-3-(3-sulfopropyl)-,hydroxide, inner salt; Benzothiazolium,5-methyl-2-[2-[[5-methyl-3-(3-sulfopropyl)-2(3H)-benzothiazolylidene]methyl]-1-butenyl]-3-(3-sulfopropyl)-,inner salt (9CI); Benzothiazolium,5-methyl-2-[2-[[5-methyl-3-(3-sulfopropyl)-2-benzothiazolinylidene]methyl]-1-butenyl]-3-(3-sulfopropyl)-,hydroxide, inner salt (8CI); Thiacarbocyanine hydroxide,anhydro-3,3'-bis(3-sulfopropyl)-5,5'-dimethyl-9-ethyl- (8CI);9-Ethyl-5,5'-dimethyl-3,3'-bis(3-sulfopropyl)thiacarbocyanine;Anhydro-3,3'-bis(g-sulfopropyl)-5,5'-dimethyl-9-ethylthiacarbocyanine;Anhydro-5,5'-dimethyl-9-ethyl-3,3'-bis(3-sulfopropyl)thiacarbocyanine hydroxide