Potassium fluoride Chemical Properties
- Melting point:
- 858 °C(lit.)
- Boiling point:
- 1505 °C
- vapor pressure
- 1.3 hPa (885 °C)
- refractive index
- Flash point:
- storage temp.
- Store at RT.
- H2O: 1 M at 20 °C, clear, colorless
- Specific Gravity
- 7.0-8.5 (25℃, 1M in H2O)
- Water Solubility
- 92.3 g/100 mL (18 ºC)
- λ: 260 nm Amax: 0.01
λ: 280 nm Amax: 0.01
- Stable. Protect from moisture. Incompatible with strong acids, strong bases.
- CAS DataBase Reference
- 7789-23-3(CAS DataBase Reference)
- NIST Chemistry Reference
- Potassium fluoride(7789-23-3)
- EPA Substance Registry System
- Potassium fluoride (7789-23-3)
- Hazard Codes
- Risk Statements
- Safety Statements
- UN 1812 6.1/PG 3
- WGK Germany
- Hazard Note
- HS Code
- 2826 19 90
- Hazardous Substances Data
- 7789-23-3(Hazardous Substances Data)
- MLD in guinea pigs (mg/kg): 250 orally, 350 s.c.; in frogs (mg/kg): 375 s.c. (Simonin)
Potassium fluoride Usage And Synthesis
Potassium 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 Properties
Potassium 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.
Anhydrous 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.
Potassium 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.
White, crystalline, deliquescent powder; sharp saline taste.Soluble in water and hydrogen fluoride, insoluble in alcohol.
Potassium fluoride is a white crystalline solid.
Potassium 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].
Toxic by ingestion and inhalation, strong irritant 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.
Poison 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.
Potassium fluoride is used in etching glass; as a preservative and insecticide.
UN1812 Potassium fluoride, solid, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
Incompatible 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
- ZIRCONIUM POTASSIUM FLUORIDE,Zirconium potassium fluoride: (Potassium fluorozirconate)
- 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 Acetate
- Potassium fluoride
- Potassium iodide
- Potassium fluoride dihydrate, Puratronic(R), 99.995% (metals basis),Potassium fluoride dihydrate, Puratronic, 99.995% (metals basis),POTASSIUM FLUORIDE HYDRATE, 99%, PURE,Potassium fluoride hydrate, pure,POTASSIUM FLUORIDE DIHYDRATE,POTASSIUM FLUORIDE DIHYDRATE REAGENT G&,Potassium fluoride (KF), dihydrate,potassium fluoride dihydrate, puratronic,Potassium fluoride dihydrate 98%
- Potassium persulfate
- Potassium sorbate
- Losartan potassium
- POTASSIUM CYANIDE
- FLUORIDE STANDARD
- Potassium chloride
- 021-65170812- ;021-65170812-
- 010-82848833- ;010-82848833-