Potassium fluoride NEW

CAS:	7789-23-3
MF:	FK
MW:	58.1
EINECS:	232-151-5
Product Categories:	Fluoride;metal halide;Essential Chemicals;Inorganic Salts;Materials Science;Metal and Ceramic Science;Inorganics;Chemistry;Fluoride SourcesMetal and Ceramic Science;Reagent Grade;Potassium Salts;Reagent Plus;Research Essentials;Solutions and Reagents;ACS GradeProtection and Derivatization;Deprotecting Reagents;Essential Chemicals;Fluoride Sources;Routine Reagents;Potassium SaltsEssential Chemicals;Metal and Ceramic Science;Reagent Plus;Salts;Analytical Reagents for General Use;O-P, Puriss p.a.;Puriss p.a.;Crystal Grade Inorganics;Potassium Salts;PotassiumMetal and Ceramic Science;Protection and Derivatization;7789-23-3
Mol File:	7789-23-3.mol

Chemical Properties	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.
Uses	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.
Preparation	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.
Chemical Properties	White, crystalline, deliquescent powder; sharp saline taste.Soluble in water and hydrogen fluoride, insoluble in alcohol.
Chemical Properties	Potassium fluoride is a white crystalline solid.
Uses	Industry Application Role/benefit Organic synthesis Preparation of various organic fluoride Fluorinating agent/replaces other halide ions like chlorine, bromine etc. Chemical manufacture Manufacture of polyurethanes and alkyl benzenes Catalyst/promote the reaction rate Manufacture of pesticides and insecticides Fluorinating agent; ingredient Manufacture of potassium bifluoride Raw material Metallurgy Soldering Soldering fluxes/help to remove oxide film Tin plating Plating composition/source of fluoride Glass Etching of glass Glass etching composition; source of fluoride Others Food and wood preservative Source of fluoride Absorption of hf and moisture Adsorbent/anhydrous potassium fluoride has hydroscopicity Complexometric titration of tantalum Masking agent Extraction of tantalum from ore Precipitator/reacts with fluorotantalic acid to precipitate potassium fluorotantalate
Uses	Potassium fluoride is used in metal finishing, batteries, coatings and photographic chemicals. It is utilized for the study of ion-specific swelling and de-swelling of ampholytic polymer gels as well as in the measurement of electronic polarizabilities of ions in polymers of alkali halides. It finds application in the electronic industry as a metal surface treatment product. It is used as a preservative, a food additive, a catalyzer and a water absorbing agent. In the Finkelstein reaction, it is actively involved in the conversion of chlorocarbons to fluorocarbons using polar solvents like dimethyl formamide and ethylene glycol.
Definition	ChEBI: Potassium fluoride is a fluoride salt having K+ as the counterion. It has a role as a poison. It is a fluoride salt and a potassium salt.
Reactivity Profile	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].
Hazard	Toxic by ingestion and inhalation, strong irritant 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.
Safety Profile	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.
Potential Exposure	Potassium fluoride is used in etching glass; as a preservative and insecticide.
Shipping	UN1812 Potassium fluoride, solid, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
Incompatibilities	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 )

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