This chemical is widely used in bioconjugation and click chemistry applications, particularly for attaching biomolecules to surfaces or other molecules. Its long PEG (polyethylene glycol) chain provides solubility and reduces steric hindrance, making it ideal for modifying proteins, peptides, or nanoparticles. The azide group enables efficient and selective reactions with alkyne-functionalized compounds via copper-catalyzed azide-alkyne cycloaddition (CuAAC), a key technique in drug delivery, diagnostics, and material science. It is also employed in the development of targeted therapeutics, where it helps create stable and biocompatible conjugates. Additionally, its hydrophilic nature makes it suitable for applications in aqueous environments, such as in vivo studies or surface functionalization in biomedical research.