Potassium hydrogen fluoride
Potassium hydrogen fluoride Chemical Properties
- Melting point:
- 239 °C(lit.)
- 2.37 g/mL at 25 °C(lit.)
- Crystals or Crystalline Powder
- White to light gray
- Specific Gravity
- Water Solubility
- 39 g/100 mL (20 ºC)
- CAS DataBase Reference
- 7789-29-9(CAS DataBase Reference)
- NIST Chemistry Reference
- Potassium hydrogen fluoride(7789-29-9)
- EPA Substance Registry System
- Potassium bifluoride (7789-29-9)
Potassium hydrogen fluoride Usage And Synthesis
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.
 Gary A. Molander, David J. Cooper and Stephen W. Wright, Potassium Hydrogen Fluoride, e-EROS Encyclopedia of Reagents for Organic Synthesis, 2001
 Bernd Basner, Houben-Weyl Methods of Organic Chemistry Vol. E 10b/1, 4th Edition, 1999
 Francis I. Onuska and Francis W. Karasek, Open Tubular Column Gas Chromatography in Environmental Sciences, 1984
 Michael Howe, Wheel cleaning composition containing acid fluoride salts, Patent “US 5556833 A”, 1996
 Grzegorz Lewandowski, Egbert Meissner and Eugeniusz Milchert, Special applications of fluorinated organic compounds, Journal of Hazardous Materials, 2006, vol. 136, 385-391
WHITE TO LIGHT GREY CRYSTALS OR CRYSTALLINE POWDER
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.
Colorless crystals, corrosive to tissues, etches glass.
Air & Water Reactions
Water soluble giving strongly acidic solutions.
Acidic salts, such as Potassium hydrogen fluoride, 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.
Corrosive to tissue.
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.
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.
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.
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.]
Potassium hydrogen fluoride Preparation Products And Raw materials
- Potassium sulfate
- Hydrofluoric acid
- POTASSIUM HYDROGENSULFIDE,
- Pyridine hydrofluoride
- Potassium sorbate
- Potassium hydride
- Potassium Acetate
- Potassium hydrogen fluoride
- Losartan potassium
- Ammonium hydrogen difluoride
- Potassium iodide
- Potassium borohydride
- Potassium persulfate
- Potassium fluoride dihydrate
- Sodium hydrogen difluoride
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