Widely used in bioconjugation and chemical biology, this compound serves as a versatile linker for attaching functional groups to biomolecules. Its azido group enables click chemistry reactions, particularly with alkynes, facilitating the creation of stable triazole linkages. The PEG (polyethylene glycol) spacer enhances solubility and reduces steric hindrance, making it ideal for modifying peptides, proteins, or other biomolecules. The Boc (tert-butyloxycarbonyl) group provides temporary protection for amines during synthesis, which can be easily removed under acidic conditions. This makes it valuable in the development of drug delivery systems, targeted therapies, and biophysical studies.