This compound is widely used in bioconjugation chemistry, particularly for linking biomolecules such as proteins, peptides, or antibodies to other molecules or surfaces. Its azide group allows for efficient click chemistry reactions, often with alkyne-functionalized compounds, enabling the formation of stable triazole linkages. The NHS ester group reacts with primary amines, making it ideal for modifying amino groups in biomolecules. This chemical is instrumental in creating targeted drug delivery systems, developing diagnostic probes, and engineering functionalized materials for biomedical research. Its PEG spacer enhances solubility and reduces steric hindrance, improving the efficiency of conjugation processes.