Because it contains an iodide ion, tetramethylammonium iodide is a potent nucleophile. It has been employed in a number of chemical reactions, including cross-coupling reactions and nucleophilic replacements. TMAI can transfer charged species across immiscible phases, making it useful as a phase-transfer catalyst in organic synthesis.
The use of tetramethylammonium iodide in energy storage systems like supercapacitors and lithium-ion batteries has also been researched. Due to its strong ionic conductivity and stability, it has been demonstrated to enhance the functionality and stability of these devices.
Tetramethylammonium iodide is a versatile substance with potential applications in many different industries, and additional study is being conducted to better understand its characteristics and prospective applications.