Used primarily in organic synthesis as a phase-transfer catalyst, facilitating the reaction between compounds in different phases. It is also employed in electrochemical studies to investigate ion transport and membrane behavior. Additionally, it serves as a reagent in the preparation of quaternary ammonium compounds, which have applications in surfactants, disinfectants, and fabric softeners. In neuroscience research, it is utilized to block potassium channels, aiding in the study of neuronal activity and signaling pathways.