Used in bioconjugation and drug delivery systems, it serves as a linker molecule to connect drugs, peptides, or proteins to other entities, enhancing solubility and stability. It is also employed in the development of targeted therapies, where it helps in attaching targeting ligands to therapeutic agents, improving their specificity and efficacy. Additionally, it plays a role in modifying surfaces of nanoparticles or biomaterials to improve biocompatibility and reduce immunogenicity. Its PEG (polyethylene glycol) chain provides flexibility and reduces aggregation, making it valuable in various biomedical applications.