Used extensively in bioconjugation and click chemistry, this compound serves as a linker to attach biomolecules or functional groups. Its azide group enables efficient reactions with alkynes via copper-catalyzed azide-alkyne cycloaddition (CuAAC), making it valuable in drug delivery systems, polymer modification, and surface functionalization. The PEG (polyethylene glycol) spacer enhances solubility and biocompatibility, making it suitable for applications in biopharmaceuticals, diagnostics, and material science. It is particularly useful in creating targeted therapeutics and imaging agents by facilitating the attachment of targeting moieties or labels to biomolecules.