Used as an efficient coupling agent in peptide synthesis, facilitating the formation of amide bonds by activating carboxylic acids. It is particularly effective in solid-phase peptide synthesis due to its stability and high reactivity, minimizing racemization. Also employed in the preparation of bioconjugates and pharmaceutical intermediates where selective and mild activation is required. Its disulfide-containing structure allows for potential use in redox-responsive linker systems in drug delivery applications.