Used as an ionic liquid in electrochemical applications such as batteries and capacitors due to its high ionic conductivity and wide electrochemical window. It serves as a green solvent in organic synthesis, facilitating reactions like Heck coupling and Diels-Alder with improved yields and reusability. Commonly employed in separation processes, including extraction of metals and desulfurization of fuels, thanks to its low volatility and tunable solubility. Also utilized in analytical chemistry as a buffer additive in chromatography and as a matrix in mass spectrometry for improved detection of biomolecules.