Used as a key intermediate in the synthesis of PEGylated compounds, enhancing solubility and stability of pharmaceuticals. Commonly employed in bioconjugation processes to link drugs, peptides, or proteins with polyethylene glycol chains, improving their pharmacokinetic profiles. Also utilized in the development of functionalized nanoparticles and targeted drug delivery systems due to its reactive amine group and hydrophilic PEG-like chain. Found in surface modification of biomaterials to reduce protein adsorption and improve biocompatibility.