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1.05030

Sigma-Aldrich

Potassium fluoride

extra pure, Technipur®

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Linear Formula:
KF
CAS Number:
7789-23-3
Molecular Weight:
58.10
Beilstein:
3902818
MDL number:
MFCD00011398

vapor pressure

1.3 hPa ( 885 °C)

Quality Level

200

pH

8-9 (20 °C, 50 g/L in H2O, slurry)

bp

>1505 °C/1013 hPa

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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Application

Potassium fluoride (KF) occurs naturally as the mineral carobbiite. It is mainly used as a fluorinating agent in chemical industries to produce a wide-range of fluorinated compounds by selective fluorination reactions. It also finds application in the electronic industry as a metal surface treatment product. Upon post-deposition treatment of KF in CuInGaSe2 (CIGS) based thin-film solar cells, power conversion efficiency is enhanced. This surface modification has a direct influence on solar cell performance leading to an increase in open-circuit voltage, fill factor, and net charge carrier density of the cell.

KF can also be used as:
  • A fluxing agent in the field of metallurgy for metal-joining operations, including welding, soldering, and brazing.
  • An etching agent in the manufacture of some optical glasses.
  • An additive in the formation of single crystals to change the crystal structure, crystal size, and crystal morphology.
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.

Legal Information

Technipur is a registered trademark of Merck KGaA, Darmstadt, Germany

Pictograms

CorrosionSkull and crossbones
GHS05,GHS06

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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Comparison of Different Etching Agents and Repair Materials Used on Feldspathic Porcelain
Lundvall PK, et al.
Journal of Adhesion Science and Technology, 23(7-8), 1177-1186 (2009)
Structural properties and chemical flux reactivities of aqueous suspensions of mixtures of potassium tetrafluoroborate and potassium fluoride
Ross RA, et al.
Thermochimica Acta, 107, 321-329 (1986)
Mild Copper-Catalyzed Fluorination of Alkyl Triflates with Potassium Fluoride
Dang H, et al.
Angewandte Chemie (International Edition in English), 53(25), 6473-6476 (2014)
Crystal growth and characterization of ?-glycine grown from potassium fluoride for photonic applications
Dillip GR, et al.
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, 79(5), 1123-1127 (2011)
Potassium fluoride postdeposition treatment with etching step on both Cu-rich and Cu-poor CuInSe2 thin film solar cells
Babbe F, et al.
Physical Reiview Materials (2018)
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