Used in bioconjugation and drug delivery systems, it serves as a linker molecule to attach therapeutic agents or targeting moieties to biomolecules. Its PEG (polyethylene glycol) chain enhances solubility and reduces immunogenicity, making it valuable in creating biocompatible conjugates. The propargyl group enables click chemistry reactions, allowing efficient and specific coupling with azide-functionalized molecules. This chemical is particularly useful in developing antibody-drug conjugates (ADCs), peptide-drug conjugates, and other targeted therapies. It also finds applications in surface modification and functionalization of nanoparticles for improved stability and targeting in biomedical research.