Fluoroantimonic acid

Fluoroantimonic acid
	Fluoroantimonic acid stored in a PFA bottle
Names
	IUPAC name Fluoroantimonic acid
	Systematic IUPAC name Hexafluoroantimonic acid
	Other names Fluoroantimonic(V) acid; Hydrogen fluoroantimonate; Fluoronium Fluoroantimonate; Fluoronium Hexafluoroantimonate;
Identifiers
CAS Number	16950-06-4 (HSbF6) ;
3D model (JSmol)	Interactive image;
ChemSpider	32741664 ;
ECHA InfoCard	100.037.279
EC Number	241-023-8;
PubChem CID	11118066 wrong formula;
CompTox Dashboard (EPA)	DTXSID10894750 ;
	InChI InChI=1S/FH2.6FH.Sb/h1H2;6*1H;/q+1;;;;;;;+5/p-6 Key: HBGBSIVYTBPVEU-UHFFFAOYSA-H ;
	SMILES [FH2+].F[Sb-](F)(F)(F)(F)F;
Properties
Molar mass	236.756 g/mol
Appearance	Colorless fuming liquid
Density	2.885 g/cm3
Boiling point	40 °C (104 °F; 313 K) (decomposes)
Solubility in water	Reacts explosively
Solubility	SO2ClF, SO2
Related compounds
Related acids	Antimony pentafluoride; Hydrogen fluoride; Magic acid
	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

Fluoroantimonic acid is a mixture of hydrogen fluoride and antimony pentafluoride, containing various cations and anions (the simplest being H
₂F⁺
and Sb F⁻
₆). This mixture is a superacid that, in terms of corrosiveness, is trillions of times stronger than pure sulfuric acid when measured by its Hammett acidity function. It even protonates some hydrocarbons to afford pentacoordinate carbocations (carbonium ions).^[1] Like its precursor hydrogen fluoride, it attacks glass, but can be stored in containers lined with PTFE (Teflon) or PFA.

^ Olah, G. A. (2001). A Life of Magic Chemistry: Autobiographical Reflections of a Nobel Prize Winner. John Wiley and Sons. pp. 100–101. ISBN 978-0-471-15743-4.