Used as an ionic liquid in catalysis, particularly in organic synthesis such as Friedel-Crafts alkylation, Diels-Alder, and Heck reactions due to its ability to stabilize catalysts and enhance reaction rates. Serves as a green solvent because of low volatility and high thermal stability. Applied in electrochemistry as an electrolyte in batteries and supercapacitors. Also utilized in biomass processing and as a medium for CO₂ capture and separation processes.