Used as a versatile linker in bioconjugation, it facilitates the attachment of biomolecules such as peptides, proteins, or antibodies to other substrates. Its azide group enables click chemistry reactions, particularly with alkynes, for efficient and selective coupling. The Boc (tert-butoxycarbonyl) group provides protection for amines during synthesis, ensuring controlled reactions. The PEG (polyethylene glycol) spacer enhances solubility and reduces steric hindrance, improving the efficiency of conjugation processes. Commonly applied in drug delivery systems, diagnostic probes, and surface functionalization of nanomaterials.