This chemical is widely used in bioconjugation and click chemistry applications, where it serves as a linker or spacer molecule. Its azide groups enable efficient and selective reactions with alkyne-containing compounds through the copper-catalyzed azide-alkyne cycloaddition (CuAAC) reaction, making it valuable for labeling, modifying, or crosslinking biomolecules like proteins, peptides, and nucleic acids. Additionally, its PEG (polyethylene glycol) chain enhances solubility, reduces immunogenicity, and improves stability in biological systems. It is commonly employed in drug delivery systems, surface functionalization, and the development of biomaterials for research and therapeutic purposes.