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Merck
CN

01132

Sigma-Aldrich

Potassium fluoride

purified, ≥99%

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About This Item

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:
329747219
NACRES:
NA.55

Key Documents

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Assay

≥99%

form

crystalline

quality

purified

loss

≤0.5% loss on ignition, 500 °C, 2 h

mp

858 °C (lit.)

anion traces

chloride (Cl-): ≤100 mg/kg
sulfate (SO42-): ≤500 mg/kg

cation traces

Fe: ≤50 mg/kg

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 (KF) on activated alumina is a highly reactive catalyst (basic in nature) for various organic reactions. High reactivity is due to the formation of potassium hexafluoroaluminiate, potassium hydroxide and potassium aluminate on the interaction of its fluoride ion with alumina. Celite coated with potassium fluoride is an economical reagent for hydrogen-bond-assisted reactions. Potassium fluoride on basic alumina in acetonitrile with ultrasound has been employed for the deprotection of tert-butyldimethylsilyl ethers of phenols.

Application

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.
Potassium fluoride may be employed for doping the natural calcium phosphate (NP) for high yield synthesis of activated alkenes.

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

Storage Class Code

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

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

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Selective desilylation of tert-butyldimethylsilyl ethers of phenols using potassium fluoride-alumina and ultrasound.
Schmittling EA and Sawyer JS.
Tetrahedron Letters, 32(49), 7207-7210 (1991)
Natural phosphate doped with potassium fluoride and modified with sodium nitrate: Efficient catalysts for the Knoevenagel condensation.
Sebti S, et al.
Tetrahedron Letters, 43(10), 1813-1815 (2002)
Potassium fluoride on celite. A versatile reagent for C-, N-, O-, and S-alkylations.
Ando T and Yamawaki J.
Chemistry Letters (Jpn), 1, 45-46 (1979)
Characterization of the actual catalytic agent in potassium fluoride on activated alumina systems.
Weinstock LM, et al.
Tetrahedron Letters, 27(33), 3845-3848 (1986)

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