Used primarily as a reagent in organic synthesis, particularly in the protection of amines during peptide synthesis. It acts as a carbobenzyloxy (Cbz) protecting group equivalent, allowing selective modification of amino groups in complex molecules. Its nitro-substituted aromatic ring enhances reactivity and can also serve as a chromophore for monitoring reaction progress via UV detection. Commonly employed in the preparation of intermediates for pharmaceuticals and bioactive compounds where controlled activation and deprotection are required.