This chemical is primarily used as a heterobifunctional crosslinker in biochemical and bioconjugation applications. Its maleimide group allows for selective conjugation with thiol groups (-SH) in proteins, peptides, or other biomolecules, while the carboxylic acid group enables further functionalization or coupling to amine-containing molecules. This makes it valuable in the development of antibody-drug conjugates (ADCs), where it helps link therapeutic agents to antibodies for targeted drug delivery. Additionally, it is utilized in the modification of surfaces, nanoparticles, or polymers for biomedical research, diagnostics, and therapeutic purposes. Its polyethylene glycol (PEG) spacer enhances solubility and reduces steric hindrance, improving the efficiency of conjugation reactions.