Used in the synthesis of complex molecules, particularly in the field of bioconjugation and drug delivery systems. It serves as a linker or spacer in the development of targeted therapies, enabling the attachment of drugs to carriers like antibodies or nanoparticles. Its PEG (polyethylene glycol) chain enhances solubility and stability, while the propargyl group allows for click chemistry reactions, facilitating efficient and specific coupling with azide-containing molecules. This compound is valuable in creating advanced pharmaceutical formulations, diagnostic tools, and research reagents.