Used in bioconjugation and chemical biology, this compound is a valuable tool for attaching azide-functionalized molecules to other entities via click chemistry. The bromo group enables selective alkylation reactions, such as with thiol groups on cysteine residues in proteins. It is particularly useful in labeling biomolecules, such as proteins or nucleic acids, for imaging, tracking, or therapeutic purposes. The PEG spacer enhances solubility and reduces steric hindrance, making it ideal for applications in drug delivery systems and the development of targeted therapies. Additionally, it plays a role in surface modification and material science, enabling the functionalization of nanoparticles or polymers for advanced research and industrial applications.