Used as a versatile building block in organic synthesis, particularly in click chemistry applications. It serves as a key intermediate for the development of bioconjugates, polymers, and dendrimers. The compound is widely employed in the modification of biomolecules, such as proteins, peptides, and nucleic acids, due to its reactive propargyl group, which enables efficient coupling with azides via copper-catalyzed azide-alkyne cycloaddition (CuAAC). It is also utilized in the preparation of drug delivery systems, where its PEG spacer enhances solubility and biocompatibility. Additionally, it finds applications in material science for surface functionalization and the creation of advanced materials with tailored properties.