Used primarily in organic synthesis as a reagent for introducing the chlorobenzyloxycarbonyl (Cbz) protecting group. This group is crucial in peptide chemistry for protecting amine functionalities during synthesis, ensuring selective reactions at other sites. It is also employed in the preparation of pharmaceuticals and fine chemicals, where temporary protection of amines is required. Additionally, it serves as an intermediate in the production of agrochemicals and other specialty chemicals. Its reactivity makes it valuable in constructing complex molecular structures with high precision.