Used primarily as an intermediate in organic synthesis, especially in the preparation of pharmaceuticals and functionalized polymers. It serves as a key building block for introducing pyridinium moieties into larger molecules, which can enhance solubility or modify biological activity. Commonly employed in the development of ionic liquids and surfactants due to its ability to form stable quaternary ammonium salts. Also utilized in the synthesis of ligands for catalysis and in the fabrication of specialty resins with tailored surface properties.