This chemical is widely used in bioconjugation and protein modification. It serves as a linker molecule, enabling the attachment of biomolecules like peptides, proteins, or antibodies to other functional groups or surfaces. Its maleimide group reacts specifically with thiol groups, making it valuable for creating stable thioether bonds in targeted drug delivery systems, antibody-drug conjugates, and diagnostic probes. The PEG4 spacer enhances solubility and reduces steric hindrance, improving the efficiency of conjugation processes. Additionally, the amine group allows for further functionalization or coupling with carboxyl-containing molecules, expanding its utility in biotechnological and pharmaceutical research.