Iodoethane is commonly used as an alkylating agent in organic synthesis, where it introduces ethyl groups into various compounds. It is particularly useful in the preparation of ethyl derivatives of alcohols, amines, and thiols. In the pharmaceutical industry, it serves as a reagent for the synthesis of active pharmaceutical ingredients (APIs) and intermediates. Additionally, iodoethane is employed in the production of ethyl ethers and esters, which are essential in the development of flavors, fragrances, and solvents. Its reactivity in nucleophilic substitution reactions makes it valuable in laboratory research for studying reaction mechanisms and creating complex organic molecules.