This compound is widely utilized in bioconjugation chemistry due to its azide functional group, which enables click chemistry reactions, particularly with alkynes. It is often employed to modify biomolecules, such as proteins, peptides, and antibodies, facilitating the attachment of fluorescent dyes, drugs, or other functional groups for research and therapeutic purposes. Its PEG (polyethylene glycol) spacer enhances solubility and reduces steric hindrance, making it ideal for creating stable and biocompatible conjugates. Additionally, it is used in surface modification of nanoparticles and materials to introduce specific functionalities for targeted delivery or imaging applications.