Used as a phase transfer catalyst in organic synthesis, facilitating the movement of reactants between immiscible phases, particularly in reactions involving anions. It is employed in the preparation of pharmaceuticals and fine chemicals, where it enhances reaction rates and yields. Also utilized in the synthesis of ionic liquids, which are applied in various industrial processes for their unique solvent properties. Additionally, it serves as an electrolyte additive in electrochemical applications, improving conductivity and stability in certain systems.