– Cy3-PEG-NH2 (MW 5000) is a polyethylene glycol derivative that contains a Cy3 fluorescent dye, polyethylene glycol (PEG), and an amine group. The Cy3 fluorophore is commonly utilized in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. The maximum emission wavelength for Cy3 is approximately 562-570 nm. Cy3-PEG-NH2 (MW 5000) is suitable for applications in fluorescence imaging, fluorescent tracing, and fluorescent labeling.