Used as a key intermediate in the synthesis of PEGylated compounds, enhancing solubility and stability of pharmaceuticals. Commonly employed in bioconjugation techniques to link drugs, peptides, or imaging agents to polyethylene glycol (PEG) chains, improving their pharmacokinetic profiles. Applied in the development of drug delivery systems, particularly for targeted and controlled release formulations. Also utilized in surface modification of nanoparticles to reduce immunogenicity and prolong circulation time in vivo. Its hydrophilic nature makes it suitable for creating biocompatible coatings on medical devices.