This compound is primarily utilized in the field of bioconjugation and chemical biology due to its functional groups that enable selective and efficient reactions with biomolecules. It is often employed in the modification of proteins, peptides, and other biological macromolecules, facilitating the attachment of labels, tags, or other functional moieties for research and diagnostic purposes. Its structure includes a terminal alkyne, which is particularly useful in click chemistry reactions, such as the copper-catalyzed azide-alkyne cycloaddition (CuAAC), allowing for precise and stable covalent bonding. Additionally, the polyethylene glycol (PEG) linker in its structure enhances solubility and reduces immunogenicity, making it suitable for applications in drug delivery systems and therapeutic agent development. This compound is also used in the synthesis of advanced materials and surface functionalization, where its reactivity and stability are advantageous for creating tailored interfaces.