Used in bioconjugation processes to link proteins, antibodies, or other biomolecules to surfaces or labels. Its primary application is in the development of immunoassays, targeted drug delivery systems, and diagnostic probes. The reagent enables controlled, reversible crosslinking through disulfide bond formation, allowing release of conjugated molecules under reducing conditions. Commonly applied in research settings for labeling and immobilizing biomolecules in ELISA, flow cytometry, and protein-protein interaction studies. Also utilized in the preparation of antibody-drug conjugates (ADCs) where precise coupling and stability are critical.