Used as a bifunctional linker in bioconjugation chemistry, enabling the attachment of biomolecules to surfaces or nanoparticles through click chemistry. The azide group reacts selectively with alkynes via copper-catalyzed azide-alkyne cycloaddition (CuAAC), while the primary amine allows for easy coupling to carboxylic acids using standard amide bond formation. Commonly applied in the development of diagnostic probes, targeted drug delivery systems, and functionalized polymers. Its hydrophilic trioxa chain enhances solubility in aqueous environments, improving performance in biological assays and reducing nonspecific binding.