What is "magic acid"

n. (context chemistry English) A superacid, FSO₃H-SbF₅, consisting of a mixture of fluorosulfonic acid and antimony pentafluoride, capable of protonate even weak bases.

Magic acid (FSOH·SbF) is a superacid consisting of a mixture, most commonly in a 1:1 molar ratio, of fluorosulfuric acid (HSOF) and antimony pentafluoride (SbF). This conjugate Brønsted– Lewis superacid system was developed in the 1960s by the George Olah lab at Case Western Reserve University, and has been used to stabilize carbocations and hypercoordinated carbonium ions in liquid media. Magic acid and other superacids are also used to catalyze isomerization of saturated hydrocarbons, and have been shown to protonate even weak bases, including methane, xenon, halogens, and molecular hydrogen.