ICG PEG NH2 (MW 5000) is a polyethylene glycol derivative that includes the fluorescent dye Indocyanine green (ICG), polyethylene glycol (PEG), and an amino group. The ICG fluorophore is commonly employed in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. ICG PEG NH2 (MW 5000) can be used for fluorescence imaging, fluorescent tracing, and fluorescent labeling, with excitation/emission wavelengths of 785/813 nm.