Used as a titrant in non-aqueous titrations, particularly for the determination of weak acids in organic solvents. Its strong basicity makes it effective for standardizing acidic samples in pharmaceutical and industrial quality control. Commonly applied in the analysis of carboxylic acids, phenols, and other acidic functional groups where traditional aqueous titrants are less effective. Also utilized in the preparation of quaternary ammonium salts and as a catalyst in organic synthesis requiring phase-transfer conditions.