This chemical is widely used in the field of bioconjugation and drug delivery due to its polyethylene glycol (PEG) chain. The PEGylation process, which involves attaching PEG chains to molecules, enhances the solubility, stability, and bioavailability of therapeutic proteins and drugs. It is particularly useful in reducing immunogenicity and increasing circulation time in the body, making it a critical component in the development of long-acting pharmaceuticals. Additionally, it is employed in surface modification of nanoparticles to improve their biocompatibility and prevent aggregation. Its application extends to research and development of targeted therapies, where it helps in achieving controlled release and improved efficacy of drugs.