Used extensively in bioconjugation and drug delivery systems, it serves as a linker to improve the solubility and stability of therapeutic compounds. Its hydrophilic PEG moiety enhances biocompatibility and reduces immunogenicity, making it suitable for targeted drug delivery. Additionally, it is employed in the modification of peptides, proteins, and nanoparticles to prolong circulation time in the body. Its amine group allows for easy functionalization, enabling attachment to various biomolecules or surfaces in biomedical research and therapeutic applications.