This compound is widely used in bioconjugation and click chemistry applications due to its PEG3 spacer and azide functional groups. The PEG3 spacer provides flexibility and solubility, making it ideal for linking biomolecules without disrupting their function. The azide groups enable efficient reactions with alkynes via copper-catalyzed azide-alkyne cycloaddition (CuAAC), a cornerstone of click chemistry. This makes it valuable in drug delivery systems, where it can be used to attach targeting ligands or therapeutic agents to carriers. Additionally, it is employed in the development of bioconjugates for imaging, diagnostics, and therapeutic purposes, where precise and stable linkages are critical. Its N-Boc protecting group ensures stability during synthesis and can be selectively removed when needed, offering versatility in complex chemical processes.