Glucose-PEG-Cy3 is a Cy3 labeled Glucose-PEG conjugate. The Cy3 fluorophore is commonly used in applications such as immunolabeling, nucleic acid labeling, fluorescence microscopy, and flow cytometry. Cy3 has an emission maximum around 562-570 nm. Glucose-PEG improves drug cellular uptake and reduces endosomal degradation, and can be used in drug delivery.