Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) requiring tertiary amine functionalities. Its quaternary ammonium derivatives show utility in antimicrobial agents and disinfectants due to enhanced solubility and ionic character. Also employed in the preparation of specialty surfactants and corrosion inhibitors in industrial formulations. The dihydroiodide salt form improves stability and handling in moisture-sensitive reactions. Commonly utilized in research settings for alkylation and phase-transfer catalysis applications.