Used in the synthesis of complex molecules, particularly in the pharmaceutical industry, where it serves as a key intermediate for creating active pharmaceutical ingredients (APIs). It is also employed in the development of drug delivery systems, enabling the modification of drugs to improve their solubility, stability, and bioavailability. In material science, it is utilized to functionalize surfaces or polymers, enhancing their properties for specific applications such as coatings or biocompatible materials. Additionally, it plays a role in bioconjugation techniques, facilitating the attachment of polyethylene glycol (PEG) chains to proteins or peptides to reduce immunogenicity and increase circulation time in the body.