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449148

Sigma-Aldrich

Potassium fluoride

anhydrous, powder, ≥99.9% trace metals basis

Synonym(s):

Potassium monofluoride, Potassium monofluoride (KF)

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About This Item

Linear Formula:
KF
CAS Number:
7789-23-3
Molecular Weight:
58.10
Beilstein/REAXYS Number:
3902818
EC Number:
232-151-5
MDL number:
MFCD00011398
UNSPSC Code:
12352302
PubChem Substance ID:
24868456

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

CorrosionSkull and crossbones
GHS05,GHS06

signalword

Danger

Hazard Classifications

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

Storage Class

6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Macromolecules, 29, 8391-8391 (1996)
Eur. J. Solid State Inorg. Chem., 33, 809-809 (1996)
Mingming Fan et al.
Bioresource technology, 104, 447-450 (2011-12-16)
Transesterification of soybean oil with methanol was carried out in the presence of CaO-MgO and KF-modified CaO-MgO catalysts at atmospheric pressure. While the methyl ester yield for the CaO-MgO catalyst with a ratio of 8:2 (CaO:MgO) was 63.6%, it was
E Gershonov et al.
The Journal of organic chemistry, 74(1), 329-338 (2008-12-05)
A facile solvent-free hydrolysis (chemical destruction) of the warfare agents VX (O-ethyl S-2-(diisopropylamino)ethyl methylphosphonothioate), GB (O-isopropyl methylphosphonofluoridate or sarin), and HD (2,2'-dichloroethyl sulfide or sulfur mustard) upon reaction with various solid-supported fluoride reagents is described. These solid reagents include different
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