This chemical is primarily utilized in bioconjugation and click chemistry applications due to its azide functional group, which allows for efficient and selective reactions with alkyne-containing molecules. The PEG4 spacer enhances solubility and flexibility, making it suitable for linking biomolecules such as peptides, proteins, or nucleic acids without disrupting their functionality. The tri-(t-butoxycarbonylethoxymethyl) groups provide protection for reactive sites during synthesis, ensuring controlled and specific modifications. It is particularly useful in drug delivery systems, where it aids in the targeted attachment of therapeutic agents to carriers or surfaces. Additionally, its structure supports the development of advanced materials and biofunctionalized surfaces in research and industrial settings.