Used in the synthesis of polyethylene glycol (PEG) derivatives, it serves as a versatile building block in bioconjugation and drug delivery systems. Its hydrophilic PEG chain enhances solubility and stability of therapeutic compounds, making it valuable in pharmaceuticals. It is also applied in modifying proteins, peptides, and nanoparticles to improve their pharmacokinetic properties. Additionally, it is utilized in the development of hydrogels and biomaterials for tissue engineering and controlled drug release applications. Its role in creating biocompatible surfaces for medical devices further highlights its importance in biomedical research.