Fluoroantimonic acid Chemical Properties

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

Hazard Codes 

Xn,N,C,T+

Risk Statements 

20/22-51/53-35-26/27/28

Safety Statements 

61-45-36/37/39-28-26

RIDADR 

UN 2922 8/PG 2

WGK Germany 

2

Hazard Note 

Corrosive

TSCA 

Yes

HazardClass 

8

PackingGroup 

II

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Fluoroantimonic acid Usage And Synthesis

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

Uses

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.

Fluoroantimonic acid(16950-06-4)Related Product Information

• NITRONIUM HEXAFLUOROANTIMONATE
• HEXAFLUOROANTIMONIC ACID
• Sodium hexafluoroantimonate
• Silver hexafluoroantimonate
• POTASSIUM HEXAFLUOROANTIMONATE
• LITHIUM HEXAFLUOROANTIMONATE
• NITROSONIUM HEXAFLUOROANTIMONATE
• TETRAPHENYLPHOSPHONIUM HEXAFLUOROANTIMONATE
• Antimony
• DIOXYGENYL HEXAFLUOROANTIMONATE
• 2-(TRIFLUOROMETHOXY)BIPHENYL-2'-DIAZONIUM HEXAFLUOROANTIMONATE
• fluorosulphuric acid, compound with antimony pentafluoride (4:1)
• CAESIUM HEXAFLUOROANTIMONATE
• BENZYLTRIMETHYLAMMONIUM HEXAFLUOROANTIMONATE
• HEXAFLUOROANTIMONIC ACID HEXAHYDRATE
• TRIPHENYLCARBENIUM HEXAFLUOROANTIMONATE
• TRIPHENYLSULFONIUM HEXAFLUOROANTIMONATE
• PHENYLOXOCARBENIUM(BENZOYL)HEXAFLUOROANTIMONATE