This chemical is widely used in bioconjugation and click chemistry applications. It serves as a linker molecule, enabling the attachment of biomolecules like proteins, peptides, or antibodies to other functional groups or surfaces. The aminooxy group allows for oxime ligation with aldehydes or ketones, while the azide group facilitates copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions. This dual functionality makes it valuable in drug delivery systems, where it can be used to create targeted therapies by linking drugs to carriers or antibodies. Additionally, it is employed in surface modification, where it helps immobilize biomolecules onto solid supports for biosensors or diagnostic assays. Its PEG spacer enhances solubility and reduces steric hindrance, improving reaction efficiency.