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Topic summary

Hydrofluoric acid

Hydrofluoric acid
Names IUPAC name
Fluorane
Other names
Fluorhydric acid
Hydronium fluoride
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
EC Number
  • 231-634-8
RTECS number
  • MW7875000
UNII
  • InChI=1S/FH/h1H
    Key: KRHYYFGTRYWZRS-UHFFFAOYSA-N
  • InChI=1/FH/h1H
    Key: KRHYYFGTRYWZRS-UHFFFAOYAC
  • F.O
  • [F-].[OH3+]
Properties HF (aq) Appearance Colorless liquid Density1.15 g/mL (for 48% solution) Acidity (pKa) 3.17 Hazards GHS labelling: DangerH280, H300+H310+H330, H314P260, P262, P264, P270, P271, P280, P284, P301+P310, P301+P330+P331, P302+P350, P303+P361+P353, P304+P340, P305+P351+P338, P310, P320, P321, P330, P361, P363, P403+P233, P405, P410+P403, P501NFPA 704 (fire diamond)
4
0
0
ACID
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water. Solutions of HF are colorless, acidic and highly corrosive. A common concentration is 49% (48–52%) but stronger solutions are available. In industry, it is less important than its anhydrous derivative hydrogen fluoride but in the laboratory it is a more common reagent used to make some organofluorine compound and other fluorides.

Wikipedia source