Used as a reagent in organic synthesis, particularly in methylation reactions where transfer of methyl groups is required. Serves as a source of trimethylamine in the preparation of quaternary ammonium compounds, which are important in pharmaceuticals and agrochemicals. Employed in analytical chemistry for the determination of certain acids and in the development of buffer systems for specialized laboratory applications. Also finds use in the formulation of ionic liquids for catalysis and material science due to its stable ammonium cation structure.