Used as a phase transfer catalyst in organic synthesis, facilitating reactions between reagents in different phases by transferring ions into organic solvents. Commonly employed in the preparation of quaternary ammonium salts and in anion exchange processes. Also utilized in electrochemistry as a supporting electrolyte due to its high solubility in non-aqueous solvents and good ionic conductivity. Finds application in analytical chemistry for the determination of inorganic cations through precipitation or extraction methods. Additionally, used in the formulation of sensors and membranes for selective ion detection.