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Merck
CN

60344

Potassium hydrogen difluoride

purum p.a., ≥99.0% (F)

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About This Item

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

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

signalword

Danger

hcodes

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

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Information

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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)



Global Trade Item Number

SKUGTIN
M50001-25G04061836831042
67540-250ML04061836827823
67540-1L04061836827816
67540-50ML04061836827830
M50001-100G04061836831035
60344-1KG-F04061826714850
60344-250G-F04061832675688