Used in the field of biochemistry and molecular biology as a versatile tool for labeling and modifying biomolecules. It is particularly valuable in click chemistry reactions, where its alkyne group enables efficient and selective conjugation with azide-containing compounds. This makes it useful for tagging proteins, peptides, and other biomolecules for imaging, tracking, or studying cellular processes. Additionally, its PEG2 spacer enhances solubility and reduces steric hindrance, improving its effectiveness in biological systems. It is also employed in the development of glycoconjugates for research in glycoscience and drug delivery systems.