Magic acid

Magic acid
	Fluorosulfuric acid-antimony pentafluoride 1:1
Names
	IUPAC name Sulfurofluoridic acid — pentafluorostiborane (1:1)
	Other names Fluorosulfonyl Pentafluoroantimonic acid
Identifiers
CAS Number	23854-38-8 ;
3D model (JSmol)	Interactive image;
ChemSpider	17339394 ;
ECHA InfoCard	100.041.727
PubChem CID	16211378;
CompTox Dashboard (EPA)	DTXSID00894108 ;
	InChI InChI=1S/FHO3S.5FH.Sb/c1-5(2,3)4;;;;;;/h(H,2,3,4);51H;/q;;;;;;+5/p-5 Key: QNDPUZFBWUBSNH-UHFFFAOYSA-I ; InChI=1/FHO3S.5FH.Sb/c1-5(2,3)4;;;;;;/h(H,2,3,4);51H;/q;;;;;;+5/p-5/rF5Sb.FHO3S/c1-6(2,3,4)5;1-5(2,3)4/h;(H,2,3,4) Key: QNDPUZFBWUBSNH-UDIXYDQRAK;
	SMILES OS(=O)(=O)F.F[Sb](F)(F)(F)F;
Properties
Chemical formula	HSbF6SO3
Molar mass	316.82 g/mol
Appearance	Liquid
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Extremely corrosive, toxic, violent hydrolysis, oxidizer.
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H240, H271, H290, H302, H314, H335, H350, H402, H410, H411, H441
Precautionary statements	P234, P261, P264, P270, P271, P273, P280, P284, P301+P310, P301+P330+P331, P303+P361+P353, P304+P340+P310, P305+P351+P338+P310, P363, P390, P403+P233, P405, P501
NFPA 704 (fire diamond)	4 0 4 W; OX
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Magic acid (FSO₃H·SbF₅) is a superacid consisting of a mixture, most commonly in a 1:1 molar ratio, of fluorosulfuric acid (HSO₃F) and antimony pentafluoride (SbF₅). This conjugate Brønsted–Lewis superacid system was developed in the 1960s by Ronald Gillespie and his team at McMaster University, and has been used by George Olah to stabilise 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.