1-Butyl-1-methylpyrrolidinium chloride is primarily used as an ionic liquid in various industrial and research applications. It is commonly employed as a solvent in chemical reactions, particularly in catalysis and organic synthesis, due to its ability to dissolve a wide range of substances. This compound is also utilized in electrochemical applications, such as in the development of batteries and supercapacitors, where it serves as an electrolyte to enhance conductivity and stability. Additionally, it finds use in the field of material science for the preparation of advanced materials, including polymers and composites. Its role in green chemistry is notable, as it can act as an environmentally friendly alternative to traditional volatile organic solvents.