This chemical is primarily utilized in the field of bioconjugation and drug delivery systems. Its structure, featuring an azido group and polyethylene glycol (PEG) spacer, makes it highly suitable for click chemistry reactions, particularly copper-catalyzed azide-alkyne cycloaddition (CuAAC). This allows for the efficient and specific attachment of various molecules, such as drugs, peptides, or fluorescent labels, to biomolecules like proteins or antibodies. The PEG spacer enhances solubility and reduces immunogenicity, making it valuable in the development of targeted therapies and diagnostic agents. Additionally, its application extends to the modification of surfaces or nanoparticles for biomedical research, enabling precise control over molecular interactions and improving the stability of conjugated products.