Used as an ionic liquid in organic synthesis and catalysis due to its low volatility and high thermal stability. Commonly employed as a solvent or catalyst support in coupling reactions, such as Suzuki and Heck reactions, enhancing reaction efficiency and recyclability. Also applied in electrochemistry for battery systems and as a medium for CO₂ capture due to its favorable solvation properties. Its long alkyl chain improves solubility with nonpolar compounds, making it useful in biphasic reaction systems.