Used extensively in bioconjugation and chemical biology, it serves as a linker for attaching various molecules, such as drugs, proteins, or fluorescent tags, to biomolecules. Its PEG (polyethylene glycol) chain enhances solubility and reduces immunogenicity, making it ideal for drug delivery systems. The propargyl groups enable click chemistry reactions, particularly copper-catalyzed azide-alkyne cycloaddition (CuAAC), allowing for efficient and selective coupling with azide-containing compounds. This chemical is also employed in the development of hydrogels, nanoparticles, and other advanced materials for biomedical research and therapeutic applications.