Used as a reagent in organic synthesis, particularly in the preparation of N-methylpyridinium-based ionic liquids which serve as catalysts or solvents in various chemical reactions. It is also employed in electrochemical studies due to its ability to form stable cations that participate in redox processes. In addition, it finds use in the modification of surfaces and materials for sensors, where its quaternary ammonium structure enhances ionic conductivity and stability. Its role as a precursor in the synthesis of herbicides and pharmaceuticals is also notable, especially in reactions requiring pyridinium salts as intermediates.