Hexaneammonium iodide is commonly used in the synthesis of organic compounds, particularly in phase-transfer catalysis. It facilitates the transfer of reactants between immiscible phases, enhancing reaction efficiency. This chemical is also employed in the preparation of ionic liquids, which are utilized in various industrial processes for their unique solvent properties. Additionally, it serves as a precursor in the production of surfactants and other ammonium-based compounds, which are essential in detergents, emulsifiers, and dispersants. Its role in organic synthesis and material science makes it a valuable component in research and industrial applications.