| Identification | More | [Name]
Potassium hydrogen fluoride | [CAS]
7789-29-9 | [Synonyms]
POTASSIUM BIFLUORIDE
POTASSIUM HYDROGEN DIFLUORIDE
POTASSIUM HYDROGEN FLUORIDE
Bifluorure de potassium
bifluoruredepotassium
Hydrogen potassium fluoride
hydrogenpotassiumfluoride
K(HF2)
NA 1811
Potassium acid fluoride
Potassium fluoride (K(HF2))
Potassium monohydrogen difluoride
potassiumacidfluoride
potassiumfluoride(k(hf2))
Potassiumhydrofluoride
potassiumhydrogenfluoride,solution
potassiummonohydrogendifluoride
POTASSIUM HYDROGENFLUORIDE, 99.99+%
POTASSIUM HYDROGENFLUORIDE 3 M IN WATER
Potassiumhydrogenfluoride,97% | [EINECS(EC#)]
232-156-2 | [Molecular Formula]
F2HK | [MDL Number]
MFCD00011403 | [Molecular Weight]
78.1 | [MOL File]
7789-29-9.mol |
| Chemical Properties | Back Directory | [Appearance]
WHITE TO LIGHT GREY CRYSTALS OR CRYSTALLINE POWDER | [Melting point ]
239 °C(lit.) | [density ]
2.37 g/mL at 25 °C(lit.)
| [solubility ]
insoluble in ethanol | [form ]
Crystals or Crystalline Powder | [color ]
White to light gray | [Specific Gravity]
2.37 | [Water Solubility ]
39 g/100 mL (20 ºC) | [Sensitive ]
Hygroscopic | [Merck ]
14,7610 | [Exposure limits]
ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3 | [InChI]
InChI=1S/2FH.K/h2*1H;/q;;+1/p-1 | [InChIKey]
VBKNTGMWIPUCRF-UHFFFAOYSA-M | [SMILES]
F.[K+].[F-] | [CAS DataBase Reference]
7789-29-9(CAS DataBase Reference) | [NIST Chemistry Reference]
Potassium hydrogen fluoride(7789-29-9) | [EPA Substance Registry System]
7789-29-9(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
T,C | [Risk Statements ]
R25:Toxic if swallowed.
R34:Causes burns. | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S37:Wear suitable gloves .
S22:Do not breathe dust . | [RIDADR ]
UN 3421 8/PG 2
| [WGK Germany ]
1
| [RTECS ]
TS6650000
| [F ]
3 | [Hazard Note ]
Corrosive | [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
II | [HS Code ]
28261990 | [Safety Profile]
A poison. Very
corrosive and reactive. A corrosive irritant
to the eyes, skin, and mucous membranes.
When heated to decomposition it emits
toxic fumes of F and K2O. See also
FLUORIDES and HYDROFLUORIC
ACID. |
| Hazard Information | Back Directory | [General Description]
Colorless crystals, corrosive to tissues, etches glass. | [Reactivity Profile]
Acidic salts, such as POTASSIUM BIFLUORIDE(7789-29-9), are generally soluble in water. The resulting solutions contain moderate concentrations of hydrogen ions and have pH's of less than 7.0. They react as acids to neutralize bases. These neutralizations generate heat, but less or far less than is generated by neutralization of inorganic acids, inorganic oxoacids, and carboxylic acid. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. | [Air & Water Reactions]
Water soluble giving strongly acidic solutions. | [Hazard]
Corrosive to tissue.
| [Health Hazard]
TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution. | [Fire Hazard]
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. | [Chemical Properties]
WHITE TO LIGHT GREY CRYSTALS OR CRYSTALLINE POWDER | [Uses]
In the preparation of pure potassium fluoride; as an electrolyte in the manufacture of fluorine; frosting glass; treating coal to prevent slag formation; flux for silver solders; catalyst in the alkylation of benzene with olefins. | [Uses]
Potassium hydrogen fluoride is widely used as an etchant in glass and cleaning products. It finds an important application in the synthesis of special optical glass viz. crown and crown flint glass and as a catalyst for polymerization. It is involved in the manufacturing of wood preservatives, soldering agents and brazing. It is also used in the manufacturing of organic and inorganic fluorine compounds. | [Purification Methods]
It crystallises from water. It is very soluble in hot H2O and 41% at 21o. [Kwasnik in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 237 1963.] |
| Questions And Answer | Back Directory | [Description]
Potassium hydrogen fluoride is used as an etchant to etch glass
surface and it is used in the cleaning products. It is used as a
fluorinating agent for fluorinated organic compounds, which could be
applied as finishing agent for fabrics, components of extinguishing
agents, electroplating bathes, lubricating oils, oxygen carriers in
blood substitutes. For example, potassium hydrogen fluoride is used
as fluorinating agent for ring opening of epoxides and cyclopropanes
and in the synthesis of trifluoroborates from various organoborons.
It may also serve as a fluoride ion source for the nucleophilic
ring-opening reaction of epoxide. | [References]
[1] Gary A. Molander, David J. Cooper and Stephen W. Wright, Potassium Hydrogen Fluoride, e-EROS Encyclopedia of Reagents for Organic Synthesis, 2001
[2] Bernd Basner, Houben-Weyl Methods of Organic Chemistry Vol. E 10b/1, 4th Edition, 1999
[3] Francis I. Onuska and Francis W. Karasek, Open Tubular Column Gas Chromatography in Environmental Sciences, 1984
[4] Michael Howe, Wheel cleaning composition containing acid fluoride salts, Patent “US 5556833 A”, 1996
[5] Grzegorz Lewandowski, Egbert Meissner and Eugeniusz Milchert, Special applications of fluorinated organic compounds, Journal of Hazardous Materials, 2006, vol. 136, 385-391
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