This chemical is widely used in bioconjugation and labeling applications due to its bifunctional nature, which allows it to link biomolecules such as proteins, peptides, or antibodies with other entities like dyes, drugs, or solid supports. The aminoethyl group enables covalent attachment to carboxyl groups via coupling reactions, while the azidoethyl group facilitates click chemistry, particularly copper-catalyzed azide-alkyne cycloaddition (CuAAC). This makes it valuable in the development of targeted drug delivery systems, diagnostic assays, and biophysical studies. Its polyethylene glycol (PEG) spacer enhances solubility and reduces steric hindrance, improving the efficiency of conjugation processes. Additionally, it is employed in surface modification and the creation of biofunctionalized materials for research and therapeutic purposes.