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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.[1]

Application

Potassium hydrogen difluoride may be employed as reagent for the regioselective transformation of epoxides to the 11-fluoro-10-hydroxy compound.[2]

Other Notes

Fluorinating agent; preparation of 2-fluoro-sugars[3]; Monofluorination of inorganic phosphate[4]

pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

signalword

Danger

hcodes

H301,H314

Hazard Classifications

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

Storage Class

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

wgk_germany

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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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)
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)
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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