Used as a key intermediate in click chemistry, particularly in copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions, enabling efficient bioconjugation and labeling of biomolecules. Its flexible polyether chain with a terminal azide group facilitates the attachment to surfaces, polymers, or fluorescent tags, making it valuable in drug discovery, material science, and development of diagnostic probes. The fluoroethoxy end enhances solubility and stability in aqueous and biological environments, supporting applications in chemical biology and pharmaceutical research.