Used extensively in bioconjugation and click chemistry, this compound facilitates the attachment of biomolecules to surfaces or other molecules due to its azide group. The PEG spacer enhances solubility and reduces steric hindrance, making it ideal for modifying peptides, proteins, and nanoparticles. It is also employed in drug delivery systems to improve the pharmacokinetics and stability of therapeutic agents. Additionally, it serves as a crosslinker in polymer chemistry, enabling the creation of hydrogels and other functional materials for biomedical applications.