Used as a reagent in organic synthesis, particularly for the introduction of the Boc (tert-butoxycarbonyl) protecting group to amines. It enables mild and selective protection of primary and secondary amines in peptide synthesis and other nitrogen-containing compounds. Its stability under various reaction conditions makes it suitable for multi-step syntheses where controlled deprotection is required. Also employed in the preparation of amino acids, pharmaceuticals, and functionalized polymers due to its efficient derivatization properties.