Synonyms: Ethanaminium,N-[4-[[4-(diethylamino)phenyl](2,4-disulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-N-ethyl-,hydroxide, inner salt, ammonium salt; Ethanaminium,N-[4-[[4-(diethylamino)phenyl](2,4-disulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-N-ethyl-,inner salt, ammonium salt (9CI)