Used primarily in organic synthesis as an alkylating agent, it introduces the pentyl group into various compounds. It is also employed in the preparation of pharmaceuticals and agrochemicals, where specific alkyl chains are required for desired biological activity. Additionally, it serves as a starting material in the production of other iodinated compounds. In research, it is utilized for studying reaction mechanisms and developing new synthetic pathways. Its applications extend to material science, where it aids in modifying surface properties of materials.