Used primarily in bioconjugation and drug delivery systems, this compound serves as a linker to attach polyethylene glycol (PEG) chains to various biomolecules, enhancing their solubility, stability, and circulation time in the body. It is particularly valuable in the development of therapeutic proteins, peptides, and nanoparticles, where PEGylation reduces immunogenicity and improves pharmacokinetics. Additionally, its alkyne group allows for specific and efficient conjugation via click chemistry, making it a versatile tool in targeted drug delivery and diagnostic applications. It is also employed in research for creating PEGylated surfaces to reduce non-specific binding in biosensors and other biomedical devices.