Used primarily in organic synthesis, sec-butyl iodide serves as an alkylating agent to introduce the sec-butyl group into various compounds. It is particularly valuable in the preparation of pharmaceuticals, agrochemicals, and specialty chemicals. The stabilization with copper chips prevents the formation of iodine, which can lead to unwanted side reactions. In research, it is employed in nucleophilic substitution reactions and in the synthesis of complex organic molecules. Its application extends to the development of intermediates for fine chemicals and industrial processes.