Tetraethylammonium iodide（Cat No.:L047918）is a quaternary ammonium salt composed of a tetraethylammonium cation and an iodide anion. It appears as a white to off-white crystalline powder, highly soluble in water and polar organic solvents. This compound is widely used in biochemical and electrophysiological research as a potassium channel blocker, aiding in studies of membrane potentials and ion transport. Its role as a phase-transfer catalyst in organic synthesis also makes it valuable in industrial and laboratory-scale reactions, facilitating the transfer of ions between immiscible phases to enhance reaction rates.