ChemicalBook > Product Catalog > Inorganic chemistry > Inorganic salts > Metal halide and Halogen salt > Metal fluoride and salt > Potassium fluoride
Basic information Chemical Properties Physical and Chemical Properties Uses Preparation Safety Related Supplier
Potassium fluoride Chemical Properties
- Melting point:858 °C (lit.)
- Boiling point:1505 °C
- Density 2.48
- vapor density 2 (vs air)
- vapor pressure 1.3 hPa (885 °C)
- refractive index 1.363
- Flash point:1505°C
- storage temp. Store at +5°C to +30°C.
- solubility H2O: 1 M at 20 °C, clear, colorless
- form spray-dried
- color White
- Specific Gravity2.481
- PH7.0-8.5 (25℃, 1M in H2O)
- Water Solubility 92.3 g/100 mL (18 ºC)
- Sensitive Hygroscopic
- λmaxλ: 260 nm Amax: 0.01
λ: 280 nm Amax: 0.01
- Merck 14,7632
- BRN 3902818
- Stability:Stable. Protect from moisture. Incompatible with strong acids, strong bases.
- CAS DataBase Reference7789-23-3(CAS DataBase Reference)
- NIST Chemistry ReferencePotassium fluoride(7789-23-3)
- EPA Substance Registry SystemPotassium fluoride (7789-23-3)
- Hazard Codes T
- Risk Statements 25-23/24/25
- Safety Statements 45-26-36/37
- RIDADR UN 1812 6.1/PG 3
- WGK Germany 3
- RTECS TT0700000
- F 3
- Hazard Note Harmful
- TSCA Yes
- HS Code 2826 19 90
- HazardClass 6.1
- PackingGroup III
- Hazardous Substances Data7789-23-3(Hazardous Substances Data)
- ToxicityMLD in guinea pigs (mg/kg): 250 orally, 350 s.c.; in frogs (mg/kg): 375 s.c. (Simonin)
Potassium fluoride Usage And Synthesis
- Chemical PropertiesPotassium fluoride, KF, is a colorless, deliquescent crystalline solid that has a melting point of 846 °C(1550 °F). Potassium fluoride has a salty taste and is poisonous. It is soluble in water,but insoluble in alcohol. Potassium fluoride is used in etching glass,preservatives, and insecticides.
- Physical and Chemical PropertiesPotassium fluoride is basis raw material of manufacturing fluoride, chemical formula is KF. Molecular weight is 58.10. It is colorless cubic crystal or white powder. It is poisonous! It is deliquescent. Taste is salty. Specific gravity is 2.48. Melting point is 858℃. Boiling point is 1505℃. It is soluble in water. It was dissolved in hydrofluoric acid and ammonia. It is insoluble in ethanol, acetone. Aqueous solution is alkaline and it can corrode glass and porcelain. It can cause irritation for human skin, mucous membrane and eye. When belows 40.2℃, it can crystallize in an aqueous solution to give dihydrate KF·2H2O, which is monoclinic, it is self-dissolved crystalline water at 41℃. It can be obtained by the thermal decomposition of potassium hydrogen fluoride or potassium carbonate (or potassium hydroxide) and hydrofluoric acid (40% or anhydrous). It can be used for glass engraving, food preservation, it can be also used as welding flux, fluoride, pesticides,etc.
Figure 1 the structural formula of potassium fluoride.
- UsesAnhydrous Potassium fluoride is used in organic synthesis as a catalyst for various reactions, or to introduce fluorine into organic molecules. For example, fluoro compounds can be prepared by replacing labile chlorine atoms by fluorine atoms, as in the manufacture of sodium fluoroacetate, a rat poison. The nucleophilic strength of F− and the solubility of KF in aprotic organic solvents may be improved by using crown ethers. The “naked” fluoride ion obtained is an efficient fluorinating agent.
- PreparationPotassium fluoride is prepared by reacting potassium carbonate (or KOH) with aqueous hydrofluoric acid. Care is necessary in handling the anhydrous salt, to prevent its hydration.
- Chemical PropertiesWhite, crystalline, deliquescent powder; sharp saline taste.Soluble in water and hydrogen fluoride, insoluble in alcohol.
- Chemical PropertiesPotassium fluoride is a white crystalline solid.
- Uses▼▲IndustryApplicationRole/benefitOrganic synthesisPreparation of various organic fluorideFluorinating agent/replaces other halide ions like chlorine, bromine etc.Chemical manufactureManufacture of polyurethanes and alkyl benzenesCatalyst/promote the reaction rateManufacture of pesticides and insecticidesFluorinating agent; ingredientManufacture of potassium bifluorideRaw materialMetallurgySolderingSoldering fluxes/help to remove oxide filmTin platingPlating composition/source of fluorideGlassEtching of glassGlass etching composition; source of fluorideOthersFood and wood preservativeSource of fluorideAbsorption of hf and moistureAdsorbent/anhydrous potassium fluoride has hydroscopicityComplexometric titration of tantalumMasking agentExtraction of tantalum from orePrecipitator/reacts with fluorotantalic acid to precipitate potassium fluorotantalate
- Reactivity ProfilePotassium fluoride reacts with acids to evolve corrosive and toxic hydrogen fluoride. Aqueous solutions corrode glass and consequently are prepared and stored in polyethylene containers. The pure solid may be stored in glass containers. Reacts violently with (Pt + BrF3). [NTP 1992].
- HazardToxic by ingestion and inhalation, strong irritant to tissue.
- Health HazardTOXIC; 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 HazardNon-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.
- Safety ProfilePoison by ingestion and intraperitoneal routes. Moderately toxic by subcutaneous route. Experimental teratogenic effects. A corrosive irritant to the eyes, skin, and mucous membranes. Mutation data reported. A very reactive material. When heated to decomposition it emits toxic fumes of K2O and F-. Used in etchmg glass, as a presewative, as an insecticide, and in organic synthesis. See also FLUORIDES and HYDROFLUORIC ACID.
- Potential ExposurePotassium fluoride is used in etching glass; as a preservative and insecticide.
- ShippingUN1812 Potassium fluoride, solid, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
- IncompatibilitiesIncompatible with strong acids; reacts releasing hydrogen fluoride. Aqueous solutions corrode glass and consequently are prepared and stored in polyeth- ylene containers. The pure solid may be stored in glass containers. Reacts violently with (Pt 1 BrF 3 )
Potassium fluoride Preparation Products And Raw materials
- Raw materialsPotassium carbonatePotassium hydroxide Hydrofluoric acid(2S,5R,6R)-6-[(R)-2-Amino-2-phenylacetamido]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acidHexafluorosilicic acid
- Preparation ProductsPotassium hydroxide 4-FluoroanilineMethyl chloroacetate(2S,5R,6R)-6-[(R)-2-Amino-2-phenylacetamido]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid3-MORPHOLINOPHENYLBORONIC ACID PINACOL ESTER6-(TRIFLUOROMETHYL)PYRIDINE-3-CARBOXALDEHYDE1-[6-(Trifluoromethyl)pyridin-2-yl]piperazine4-AMINO-2-CHLOROBENZOTRIFLUORIDE2-CHLORO-4-NITROBENZOTRIFLUORIDE5-FLUORO-1H-PYRROLO[3,2-B] PYRIDINE2-FLUORO-3-IODO-5-NITROPYRIDINE1,2,3-Trifluoro-4-nitrobenzene4-(Trifluoromethyl)nicotinic acidHexaflumuron2-Chloro-6-trifluoromethylnicotinic acid2-FLUORO-3-NITRO-5-BROMO PYRIDINE3-Chloro-4-fluoroaniline2,4-Difluoroaniline2,6-Difluorobenzamide2,4-DIAMINO-6-FLUOROPYRIMIDINE3-AMINO-2-FLUORO-4-PICOLINE2-Fluoroaniline2,6-Difluorobenzonitrile4-AMINO-2,6-DIFLUOROPYRIMIDINE2-AMINO-4,6-DIFLUOROPYRIMIDINE2-Trifluoromethyl-5-bromopyridine4-FLUORO-2-NITROBENZONITRILEFluoro-N,N,N',N'-tetramethylformamidinium hexafluorophosphate2-Fluorophenol2-Fluoroethyl bromideMethyl fluoroacetate
- POTASSIUM HEXAFLUORONICKELATE (IV) POTASSIUM FLUORIDE,potassium nickel(IV) fluoride: potassium fluoride POTASSIUM FLUORIDE HYDRATE POTASSIUM FLUORIDE, SOL. 12,5% POTASSIUM FLUORIDE ON ALUMINUM OXIDE BISMUTH POTASSIUM FLUORIDE NIOBIUM POTASSIUM FLUORIDE,COLUMBIUM POTASSIUM FLUORIDE NICKEL POTASSIUM FLUORIDE orthoboric acid, compound with potassium fluoride (1:1) Potassium fluoride on alumina,Potassium fluoride solution,POTASSIUM FLUORIDE IN D2O NMR REFERENCE STANDARD,POTASSIUM FLUORIDE ON CELITE(R) aluminium potassium fluoride ZINC POTASSIUM FLUORIDE NIOBIUM POTASSIUM FLUORIDE,COLUMBIUM POTASSIUM FLUORIDE POTASSIUM FLUORIDE 50 WT. % ON CELITE Borate(1-), tetrafluoro-, potassium, reaction products with boric acid and potassium fluoride (K(HF2)) STANNIC POTASSIUM FLUORIDE TITANIUM(IV) POTASSIUM FLUORIDE,TITANIUM(+4)POTASSIUM FLUORIDE,TITANIUM POTASSIUM FLUORIDE Boric acid (H2B4O7), dipotassium salt, reaction products with boron and potassium fluoride (K(HF2)) Potassium sorbate
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