Used in bioconjugation for reversible crosslinking due to the disulfide (SS) bridge, enabling controlled release of biomolecules under reducing conditions. Commonly applied in antibody-drug conjugate (ADC) development and protein labeling, where the NHS ester reacts with primary amines to form stable amide bonds. The cleavable linker allows intracellular delivery and release of payloads in targeted therapies. Also utilized in immobilizing biomolecules on surfaces for biosensors and diagnostic assays, with the SS linker providing a means to regenerate the surface or release captured analytes. Suitable for applications requiring temporal control over molecular attachment and release in biological environments.