BMIMBF4 is widely used as an ionic liquid in green chemistry applications due to its low volatility, high thermal stability, and ability to dissolve a variety of organic and inorganic compounds. It serves as a reusable solvent in catalytic reactions such as hydrogenation, hydroformylation, and coupling reactions, improving reaction efficiency and reducing environmental impact. Its unique solvation properties make it suitable for use in electrochemical systems, including batteries and fuel cells, where it enhances ion conductivity. BMIMBF4 is also employed in separation processes, such as extraction of aromatic compounds from mixtures, and in analytical techniques like gas chromatography as a stationary phase. Additionally, it finds use in biomass processing to dissolve cellulose and lignin, enabling more efficient conversion of biomass into biofuels and chemicals.