Used as a phase-transfer catalyst in organic synthesis, facilitating reactions between reagents in different phases by transferring ions into organic solvents. Employed in the preparation of fine chemicals and pharmaceuticals where mild and soluble quaternary ammonium salts are required. Also utilized in electrochemical studies as a supporting electrolyte due to its good solubility and stability in polar solvents. Its ionic nature makes it suitable for research involving ion transport and membrane studies.