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Potassium fluoride

Product Name:
Potassium fluoride
CAS No.
7789-23-3
Chemical Name:
Potassium fluoride
CBNumber:
CB4237549
Molecular Formula:
FK
Formula Weight:
58.1
MOL File:
7789-23-3.mol
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Potassium fluoride Property

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 RT.
solubility 
H2O: 1 M at 20 °C, clear, colorless
form 
spray-dried
color 
White
Specific Gravity
2.481
Odor
Odorless
PH
7.0-8.5 (25℃, 1M in H2O)
Water Solubility 
92.3 g/100 mL (18 ºC)
λmax
λ: 260 nm Amax: 0.01
λ: 280 nm Amax: 0.01
Sensitive 
Hygroscopic
Merck 
14,7632
BRN 
3902818
Stability:
Stable. Protect from moisture. Incompatible with strong acids, strong bases.
InChIKey
NROKBHXJSPEDAR-UHFFFAOYSA-M
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)
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Safety

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
3
Hazard Note 
Harmful
TSCA 
Yes
HS Code 
2826 19 90
HazardClass 
6.1
PackingGroup 
III
Hazardous Substances Data
7789-23-3(Hazardous Substances Data)
Toxicity
MLD in guinea pigs (mg/kg): 250 orally, 350 s.c.; in frogs (mg/kg): 375 s.c. (Simonin)
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N-Bromosuccinimide Price More Price(33)

Sigma-Aldrich Gold
Product number:
229814
Product name :
Potassium fluoride
Purity:
≥99.97% trace metals basis
Packaging:
10g
Price:
$113
Updated:
2019/12/02
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Sigma-Aldrich Gold
Product number:
01132
Product name :
Potassium fluoride
Purity:
purified, ≥99%
Packaging:
2.5kg
Price:
$300
Updated:
2018/11/22
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Alfa Aesar Gold
Product number:
010980
Product name :
Potassium fluoride, 99.99% (metals basis)
Packaging:
10g
Price:
$94.8
Updated:
2019/12/02
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Alfa Aesar Gold
Product number:
010980
Product name :
Potassium fluoride, 99.99% (metals basis)
Packaging:
2g
Price:
$27.1
Updated:
2019/12/02
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Strem Chemicals Gold
Product number:
93-1922
Product name :
Potassium fluoride, anhydrous, 98%
Packaging:
100g
Price:
$55
Updated:
2019/12/02
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Potassium fluoride Chemical Properties,Usage,Production

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
 

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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Potassium fluoride Suppliers

Global(276)Suppliers
Shanghai Aladdin Bio-Chem Technology Co.,LTD
Tel:
021-20337333-801
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021-50323701
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24984
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Shandong Yinglang Chemical Co.,Ltd.
Tel:
18888295188;18888295177
Fax:
+86-531-88999750
Email:
764200894@qq.com
Country:
China
ProdList:
67
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58
Wisdom Drugs Co., Ltd.
Tel:
0519-85138993-
Email:
1736768490@qq.com
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107
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J & K SCIENTIFIC LTD.
Tel:
010-82848833- ;010-82848833-
Fax:
86-10-82849933
Email:
jkinfo@jkchemical.com;market6@jkchemical.com
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96815
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Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel:
21-61259100-
Fax:
86-21-61259102
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sh@meryer.com
Country:
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40268
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Alfa Aesar
Tel:
400-610-6006; 021-67582000
Fax:
021-67582001/03/05
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TCI (Shanghai) Development Co., Ltd.
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ShangHai DEMO Chemical Co.,Ltd
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Beijing dtftchem Technology Co., Ltd.
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010-60270825
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dtftchem@sina.com;
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7789-23-3, Potassium fluorideRelated Search:

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Chemical Properties Physical and Chemical Properties Uses Preparation