Bis(2-iodoethyl) ether is primarily utilized in organic synthesis as a reagent for introducing iodoalkyl groups into various compounds. Its application is significant in the preparation of complex molecules, particularly in the pharmaceutical and agrochemical industries. The compound is often employed in the synthesis of active pharmaceutical ingredients (APIs) where the iodoethyl moiety plays a crucial role in the biological activity of the final product. Additionally, it serves as a cross-linking agent in polymer chemistry, facilitating the formation of polymers with specific properties. Its reactivity with nucleophiles makes it valuable in the development of novel materials and chemical intermediates.