This chemical is widely used in bioconjugation and click chemistry applications due to its azido and NHS ester functional groups. The azido group enables efficient and selective reactions with alkynes via copper-catalyzed azide-alkyne cycloaddition (CuAAC), making it valuable for labeling biomolecules such as proteins, peptides, and nucleic acids. The NHS ester group allows for covalent attachment to primary amines, facilitating the modification of proteins, antibodies, or other amine-containing molecules. The PEG spacers enhance solubility and reduce steric hindrance, improving the efficiency of conjugation reactions. This compound is particularly useful in drug delivery systems, biomaterial functionalization, and the development of diagnostic probes. Its versatility makes it a key reagent in pharmaceutical research, biotech applications, and materials science.