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449148

Sigma-Aldrich

Potassium fluoride

anhydrous, powder, ≥99.9% trace metals basis

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Synonym(s):
Potassium monofluoride, Potassium monofluoride (KF)
Linear Formula:
KF
CAS Number:
7789-23-3
Molecular Weight:
58.10
Beilstein:
3902818
EC Number:
232-151-5
MDL number:
MFCD00011398
UNSPSC Code:
12352302
PubChem Substance ID:
24868456
NACRES:
NA.23

grade

anhydrous

Quality Level

100

Assay

≥99.9% trace metals basis

form

powder

impurities

≤1000.0 ppm Trace Metal Analysis

mp

858 °C (lit.)

SMILES string

[F-].[K+]

InChI

1S/FH.K/h1H;/q;+1/p-1

InChI key

NROKBHXJSPEDAR-UHFFFAOYSA-M

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General description

Potassium fluoride is a white crystalline solid that is highly soluble in water. It is a strong base widely used in the field of catalysis, polymer synthesis, and semiconductor devices. KF has a relatively high melting point. It dissolves well in hydrofluoric acid. However, KF is insoluble in alcohol.

Application

Potassium fluoride can be used:
  • To fabricate CIGS thin films solar cells. Efficiency increased by up to 21.7% after KF postdeposition treatment. This was due to the formation of a K-containing layer on the CIGS surface, which resulted in increased surface reactivity due to the formation of a bilayer structure in which a K—In—Se species covers the CIGSe compound.
  • To fabricate 2D vanadium carbide MXene for supercapacitor electrodes.
  • To synthesize sulfonyl fluoride through electrochemical oxidative coupling.
  • As an electrolyte additive for Li-ion batteries.
  • As a catalyst for ring-opening fluorination of cyclic thioethers.
  • To synthesize solid base catalysts, KF/Ca−Mg−Al hydrotalcite for the production of Biodiesel via transesterification reactions.
A versatile fluoride ion source used in a study of ion-specific swelling and de-swelling of ampholytic polymer gels, in the room temperature oxidation of noble metals in HF, and in the measurement of electronic polarizabilities of ions in polymers of alkali halides.

Pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

Signal Word

Danger

Hazard Statements

H301 + H311 + H331,H318

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Eye Dam. 1

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

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Macromolecules, 29, 8391-8391 (1996)
An aryne triggered ring-opening fluorination of cyclic thioethers with potassium fluoride
Rong Fan, et al.
Chemical Communications (Cambridge, England), 54, 7081-7084 (2018)
Biodiesel Synthesis Catalyzed by the KF/Ca?Mg?Al Hydrotalcite Base Catalyst
Lijing Gao, et al
Energy and Fuels, 24, 646-651 (2010)
Indian Journal of Physics, 70B, 311-311 (1996)
Eur. J. Solid State Inorg. Chem., 33, 809-809 (1996)
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