1-Ethyl-3-methylimidazolium tetrafluoroborate

1-Ethyl-3-methylimidazole tetrafluoroborate is a room temperature ionic liquid (RTIL). Its molecular formula is C6H11BF4N2 and its molecular weight is 197.97. It is a colorless to light orange to yellow transparent liquid. 1-Ethyl-3-methylimidazole tetrafluoroborate has some unique properties, such as it being stable to both air and water, which means it can be stored and used without special protection. Its melting point is approximately 15°C, its boiling point exceeds 350°C, and its density is 1.282 g/mL (at 25°C). This ionic liquid has a wide range of applications in chemistry, where it can be used as a medium for chemical reactions, such as the formation of enantiomeric homophenylalanine in the enzymatic resolution of homophenylalanine esters. Additionally, it can be used as a pharmaceutical intermediate, among other applications in electrochemistry and materials science. In the laboratory, 1-ethyl-3-methylimidazole tetrafluoroborate is usually supplied in high purity form, such as above 98% (HPLC purity). It is usually kept sealed in a dry environment because it is hygroscopic, meaning it can absorb moisture. In terms of safety, 1-ethyl-3-methylimidazole tetrafluoroborate needs to be used in a well-ventilated environment and avoid inhalation of dust or contact with skin and eyes. Its flash point is approximately 113°C, making it a flammable liquid.