m-PEG3-succinimidyl carbonate is widely used in bioconjugation processes, particularly for modifying proteins, peptides, and other biomolecules. Its reactive succinimidyl carbonate group allows it to efficiently attach to primary amines, enabling the introduction of polyethylene glycol (PEG) chains. This PEGylation enhances the stability, solubility, and bioavailability of therapeutic proteins, reducing immunogenicity and prolonging their circulation time in the body. It is also employed in the development of drug delivery systems, where it helps create PEGylated conjugates for targeted and controlled release of drugs. Additionally, it finds applications in surface modification of nanoparticles and biomaterials to improve their biocompatibility and performance in biomedical applications.