Used as a bifunctional linker in bioconjugation, enabling attachment of molecules to surfaces or nanoparticles via its terminal amino and hydroxyl groups. Commonly applied in drug delivery systems, where it enhances solubility and biocompatibility of conjugated drugs. Frequently employed in the synthesis of PEGylated compounds to extend circulation time in therapeutic applications. Also utilized in diagnostic assays and biosensors for immobilizing biomolecules on solid supports. Its flexible, hydrophilic chain reduces nonspecific binding in biological environments.