Used primarily as an intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and agrochemicals. It acts as a derivatizing agent for hydroxyl and amino groups, facilitating the introduction of protecting groups or activating molecules for further reactions. Commonly employed in the synthesis of carbamates and esters under mild conditions. Its reactivity makes it useful in peptide chemistry and in the development of specialty polymers. Due to its sensitivity, it is handled under controlled conditions to ensure stability and selectivity in transformations.