Used as an active ester in peptide synthesis, particularly in solid-phase peptide coupling reactions. Its main application lies in protecting amino groups while enabling efficient amide bond formation under mild conditions. The compound facilitates selective conjugation of amino acids by reducing racemization and improving yield. It is especially useful in automated peptide synthesizers where controlled, stepwise assembly of long peptide chains is required. Also employed in the preparation of bioconjugates and pharmaceutical intermediates where precise molecular construction is critical.