Used in bioconjugation and surface modification, it serves as a linker molecule to attach biomolecules like proteins, peptides, or drugs to surfaces or other molecules. Its alkyne group enables click chemistry reactions, particularly with azides, for precise and efficient bonding. The PEG (polyethylene glycol) segment enhances solubility, reduces immunogenicity, and improves stability in biological systems. The hydroxyl group allows further functionalization or conjugation, making it versatile in drug delivery, bioimaging, and nanotechnology applications. It is particularly valuable in creating targeted therapeutic systems and biocompatible materials.