This chemical is widely used in bioconjugation and drug delivery systems due to its amine-reactive PEG spacer. The PEG (polyethylene glycol) chain enhances solubility and stability, making it suitable for modifying proteins, peptides, and other biomolecules. It is particularly useful in creating targeted therapies, as the amine group allows for covalent attachment to various functional groups. Additionally, it is employed in the development of antibody-drug conjugates (ADCs) and in surface modification of nanoparticles for improved biocompatibility and circulation time in vivo. Its application extends to diagnostic assays and biosensors, where it aids in reducing non-specific binding and improving sensitivity.