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60344

Sigma-Aldrich

Potassium hydrogen difluoride

purum p.a., ≥99.0% (F)

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About This Item

Linear Formula:
KHF2
CAS Number:
7789-29-9
Molecular Weight:
78.10
EC Number:
232-156-2
MDL number:
MFCD00011403
UNSPSC Code:
12352300
PubChem Substance ID:
329758887
NACRES:
NA.21
Assay:
≥99.0% (F)
form:
crystals or chunks
fine crystals

grade

purum p.a.

Assay

≥99.0% (F)

form

crystals or chunks
fine crystals

anion traces

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

cation traces

Ca: ≤50 mg/kg
Cd: ≤50 mg/kg
Co: ≤50 mg/kg
Cu: ≤50 mg/kg
Fe: ≤50 mg/kg
Na: ≤5000 mg/kg
Ni: ≤50 mg/kg
Pb: ≤50 mg/kg
Zn: ≤50 mg/kg

SMILES string

F.[F-].[K+]

InChI

1S/2FH.K/h2*1H;/q;;+1/p-1

InChI key

VBKNTGMWIPUCRF-UHFFFAOYSA-M

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General description

Potassium hydrogen difluoride (KHF2) is the potassium salt. Its crystal structure ressembles cesium fluoride.

Application

Potassium hydrogen difluoride may be employed as reagent for the regioselective transformation of epoxides to the 11-fluoro-10-hydroxy compound.

Other Notes

Fluorinating agent; preparation of 2-fluoro-sugars; Monofluorination of inorganic phosphate

Pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

Signal Word

Danger

Hazard Statements

H301,H314

Hazard Classifications

Acute Tox. 3 Oral - Eye Dam. 1 - Skin Corr. 1B

Storage Class Code

6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
BCCF5142
BCBV8205
BCBT1089

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Hydrogen bonding. 13. Infrared study of the HF2-anion in p-toluidinium and tetraalkylammonium hydrogen difluorides.
Harmon KM and Lovelace RR.
The Journal of Physical Chemistry, 86(6), 900-903 (1982)
W.A. Szarek et al.
Carbohydrate Research, 155, 107-107 (1986)
M. Bhattacharjee et al.
J. Chem. Soc., Dalton Trans., 477-477 (1987)
High regioselectivity in the alternative cleavage of terminal epoxides with different sources of nucleophilic fluoride.
Sattler A and Haufe G.
Journal of Fluorine Chemistry, 69(2), 185-190 (1944)
Reaction of 2-deoxy-6-O-[2,3-dideoxy-4,6-O-isopropylidene-2,3- (N-tosylepimino)-alpha-D-mannopyranosyl]-4,5-O-isopropylidene-1,3-di-N- tosylstreptamine with potassium hydrogenfluoride.
Y Kobayashi et al.
Carbohydrate research, 229(2), 363-368 (1992-05-22)
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