Anthocyanin CY5 DIME, also known as Cy5 DIME or Cyanine5 DIME, is a nitrogen-containing heterocyclic organic fluorescent dye. It belongs to the anthocyanin dye series, has far-red fluorescence characteristics, high extinction coefficient, strong fluorescence brightness, and is insensitive to pH changes. It is widely used in the field of biomedical research, especially in cell imaging, protein labeling, and gene expression analysis.