Used in bioconjugation and drug delivery systems, this compound serves as a linker to attach polyethylene glycol (PEG) chains to various molecules, enhancing solubility, stability, and bioavailability. It is particularly useful in modifying proteins, peptides, and nanoparticles to reduce immunogenicity and prolong circulation time in the body. Additionally, it is employed in the development of targeted therapies, where its aldehyde group allows for specific covalent bonding to amino groups in biomolecules. This makes it a valuable tool in creating advanced pharmaceutical formulations and biotechnological applications.