Used as a phase-transfer catalyst in organic synthesis, facilitating reactions between reagents in different phases by transferring ions into organic solvents. Commonly applied in the preparation of fine chemicals, pharmaceuticals, and agrochemicals where strong basic conditions and solubility control are required. Also utilized in analytical chemistry for ion-pairing applications and in the synthesis of quaternary ammonium compounds. Its bulky cation structure enhances selectivity in certain alkylation and esterification reactions.