This chemical is widely used in bioconjugation and click chemistry applications. Its structure, featuring a Boc-protected amine and an azide group, makes it highly suitable for coupling reactions, particularly in the synthesis of peptide-PEG conjugates. The PEG spacer enhances solubility and reduces immunogenicity, making it valuable in drug delivery systems and biopharmaceutical research. The azide group allows for efficient, site-specific modifications through copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions, enabling the attachment of targeting moieties or therapeutic agents. It is also employed in surface functionalization of materials for biosensors and biomedical devices, where controlled and stable immobilization of biomolecules is required.