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Potassium fluorosilicate

Product Name:
Potassium fluorosilicate
CAS No.
16871-90-2
Chemical Name:
Potassium fluorosilicate
CBNumber:
CB5371161
Molecular Formula:
F6K2Si
Formula Weight:
220.27
MOL File:
16871-90-2.mol
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Potassium fluorosilicate Property

Melting point:
°Cd ec.)
Boiling point:
dec
Density 
2.665 g/mL at 25 °C(lit.)
refractive index 
1.3991
form 
Powder
Specific Gravity
2.665
color 
White
Water Solubility 
Slightly soluble in water.
Sensitive 
Moisture Sensitive
Hydrolytic Sensitivity
0: forms stable aqueous solutions
Merck 
14,7638
Solubility Product Constant (Ksp)
pKsp: 6.06
CAS DataBase Reference
16871-90-2(CAS DataBase Reference)
EPA Substance Registry System
Silicate(2-), hexafluoro-, dipotassium (16871-90-2)
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Safety

Hazard Codes 
T,Xi
Risk Statements 
23/24/25
Safety Statements 
26-45
RIDADR 
UN 2655 6.1/PG 3
WGK Germany 
2
RTECS 
VV8400000
21
Hazard Note 
Irritant
TSCA 
Yes
HazardClass 
6.1
PackingGroup 
III
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N-Bromosuccinimide Price More Price(8)

Sigma-Aldrich Gold
Product number:
60322
Product name :
Potassium hexafluorosilicate
Purity:
≥99.0% (T)
Packaging:
1kg
Price:
$67.3
Updated:
2019/12/02
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Buy
Alfa Aesar Gold
Product number:
044495
Product name :
Potassium hexafluorosilicate, 99.999% (metals basis)
Packaging:
10g
Price:
$64.9
Updated:
2020/06/24
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Buy
Alfa Aesar Gold
Product number:
044495
Product name :
Potassium hexafluorosilicate, 99.999% (metals basis)
Packaging:
50g
Price:
$206
Updated:
2020/06/24
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Buy
Strem Chemicals Gold
Product number:
93-1959
Product name :
Potassium hexafluorosilicate, 99%
Packaging:
500g
Price:
$39
Updated:
2020/06/24
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Buy
Strem Chemicals Gold
Product number:
93-1959
Product name :
Potassium hexafluorosilicate, 99%
Packaging:
2kg
Price:
$136
Updated:
2020/06/24
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Potassium fluorosilicate Chemical Properties,Usage,Production

Description

As a type of fluorosilicate, potassium fluorosilicate can be used as fluoridizing agents for water supplies, in the production of synthetic cryolite, and in metal plating. Potassium fluorosilicate can be used as oral care ingredient, as a fluxing ingredient in porcelain enamels, and as wood preservative elements. Potassium fluorosilicate can also be used for the manufacture of ceramic materials and optical glasses.

References

[1] W. John Williams, Handbook of Anion Determination, 1979
[2] Ruth Winter, A Consumer's Dictionary of Cosmetic Ingredients, 7th Edition, 2009
[3] B. A. Richardson, Wood Preservation, 2nd Edition, 1993
[4] Werner Vogel, Glass Chemistry, 2nd Edition, 1994

Chemical Properties

White, odorless, crystalline powder. D 3.0. Slightly soluble in water; soluble in hydrochlo- ric acid.

Uses

In the manufacture of opalescent glass, in porcelain enamels, in insecticides. Also used in aluminum metallurgy.

General Description

A white, odorless crystalline powder. Denser than water. Contact may cause irritation to skin, eyes, and mucous membranes. May be toxic by ingestion. Used to make other chemicals.

Air & Water Reactions

Slightly soluble in water.

Reactivity Profile

Potassium fluorosilicate has weak oxidizing or reducing powers. Redox reactions can however still occur. The majority of compounds in this class are slightly soluble or insoluble in water. If soluble in water, then the solutions are usually neither strongly acidic nor strongly basic. These compounds are not water-reactive.

Hazard

Toxic by ingestion and inhalation, strong irritant to tissue.

Health Hazard

Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. 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. Containers may explode when heated. Runoff may pollute waterways.

Industrial uses

Potassium fluorosilicate is a white to yellowish powder, poorly soluble in water (0.68% at 20 °C). Because of its poor solubility, it is not commonly used as a modifying reagent.

Safety Profile

A poison by ingestion and subcutaneous routes. Ingestion can cause vomiting and dtarrhea. A strong irritant. Incompatible with hydrofluoric acid. When heated to decomposition it emits toxic fumes of SiF4, K3SiF7, and KF.

Purification Methods

Crystallise it several times from conductivity water (100mL/g) between 100o and 0o.

Potassium fluorosilicate Preparation Products And Raw materials Raw materials

Raw materials

Preparation Products

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Potassium fluorosilicate Suppliers

Global(183)Suppliers
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Description References