This chemical is primarily utilized in the field of bioconjugation and click chemistry due to its reactive propargyl group. It serves as a linker or spacer in the synthesis of complex molecules, particularly in the development of drug delivery systems and targeted therapies. Its polyethylene glycol (PEG) component enhances solubility and biocompatibility, making it suitable for applications in pharmaceuticals and biomaterials. Additionally, it is employed in the modification of proteins, peptides, and other biomolecules to improve their stability and functionality in biological systems. Its use in research and development of diagnostic tools and therapeutic agents is also notable, as it facilitates efficient and specific chemical reactions.