This chemical is widely used in bioconjugation and click chemistry applications. It serves as a linker molecule, enabling the attachment of polyethylene glycol (PEG) chains to various biomolecules, such as proteins, peptides, or antibodies. The azide group allows for efficient and selective reactions with alkyne-functionalized compounds through copper-catalyzed azide-alkyne cycloaddition (CuAAC). This process is particularly valuable in drug delivery systems, where it enhances the solubility, stability, and bioavailability of therapeutic agents. Additionally, it is utilized in the development of hydrogels, surface modifications, and biomaterials for tissue engineering. Its role in creating biocompatible and functionalized materials makes it a key component in advanced biomedical research and applications.