It's bmim! For those who don't pay much attention to ionic liquids, 1-butyl-3-methylimidazolium, or "bmim", is one of the most common — if not #1 — ionic liqui

It's bmim! For those who don't pay much attention to ionic liquids, 1-butyl-3-methylimidazolium, or "bmim", is one of the most common — if not #1 — ionic liquids used in organic chemistry. This property is rather unexpected, but the compound is not itself new or unusual. As for the perchlorate anion, it's a little surprising, but given the cost of bmim (which is unlikely to come down), I don't think the authors expect it to be cost-effective outside of safety-critical environments where a fume hood could be employed.