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HomeProduct name listFluoroantimonic acid

Fluoroantimonic acid

Synonym(s):Fluoroantimonic acid;Hexafluoroantimonic acid;Hexafluorostibonic acid;Monohydrogen hexafluoroantimonate

  • CAS NO.:16950-06-4
  • Empirical Formula: F6HSb
  • Molecular Weight: 236.76
  • MDL number: MFCD00011327
  • EINECS: 241-023-8
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-04-19 18:20:27
Fluoroantimonic acid Structural

What is Fluoroantimonic acid?

Description

Fluoroantimonic acid (HSbF6), the strongest known superacid, is made by combining HF with SbF5. It can be as much as 2 × 1019?times stronger than 100% H2SO4. However, superacids are all equally strong in aqueous solution; other solvents must be used to observe their effects.

Chemical properties

superacid; moisture sensitive [KIR78] [ALD94]
Strongest superacid known
mixture of HF and SbF5 (1:1 is strongest)
Protonate even hydrocarbons to afford carbocations and H2.
2×1019 (20 quintillion) times stronger than 100% sulfuric acid.
Ho values of -31.3

The Uses of Fluoroantimonic acid

Hydrogen hexafluoroantimonate(V) is an excellent medium for the preparation of alkylidene oxonium salts.

Preparation

Fluoroantimonic acid is produced by reacting hydrogen fluoride (HF) with antimony pentafluoride (SbF5).
SbF5+HF→SbF6+HF

General Description

HF/SbF5 may be synthesized by mixing hydrogen fluoride and antimony fluoride.1 Fluoroantimonic acid (HF/SbF5), is a combination of SbF5 and HF. It is the known strongest liquid superacid.

Properties of Fluoroantimonic acid

Melting point: 20°C
Density  2.885 g/mL at 25 °C(lit.)
vapor pressure  14 mm Hg ( 18 °C)
form  liquid
color  yellow to colorless
Water Solubility  It is fully miscible with water, soluble in SO2ClF, SO2.
Exposure limits ACGIH: TWA 0.5 mg/m3
NIOSH: IDLH 50 mg/m3; TWA 0.5 mg/m3
CAS DataBase Reference 16950-06-4(CAS DataBase Reference)
EPA Substance Registry System Antimonate(1-), hexafluoro-, hydrogen, (OC-6-11)- (16950-06-4)

Safety information for Fluoroantimonic acid

Signal word Danger
Pictogram(s)
ghs
Corrosion
Corrosives
GHS05
ghs
Skull and Crossbones
Acute Toxicity
GHS06
ghs
Environment
GHS09
GHS Hazard Statements H314:Skin corrosion/irritation
H411:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes P260:Do not breathe dust/fume/gas/mist/vapours/spray.
P273:Avoid release to the environment.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for Fluoroantimonic acid

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