Used in the synthesis of antibody-drug conjugates (ADCs) as a linker component, enabling controlled release of cytotoxic agents in targeted cancer therapies. Its disulfide bond provides sensitivity to intracellular reducing environments, facilitating drug release inside cancer cells. Also employed in bioconjugation chemistry for attaching payloads to biomolecules with high specificity. Suitable for research in drug delivery systems and development of biopharmaceuticals.