Used in bioconjugation and click chemistry applications, it serves as a linker for attaching polyethylene glycol (PEG) chains to biomolecules, enhancing their stability and solubility. Commonly employed in drug delivery systems to improve pharmacokinetics and reduce immunogenicity of therapeutic proteins and peptides. Also utilized in the development of hydrogels and biomaterials for tissue engineering and regenerative medicine. Its alkyne group enables efficient coupling with azide-containing molecules via copper-catalyzed azide-alkyne cycloaddition (CuAAC), making it valuable in labeling and tracking studies in biological research.