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Man Made Cryolite Powder , Pure UN Number 2674 Sodium Hexafluorosilicate

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Man Made Cryolite Powder , Pure UN Number 2674 Sodium Hexafluorosilicate

Man Made Cryolite Powder , Pure UN Number 2674 Sodium Hexafluorosilicate
Man Made Cryolite Powder , Pure UN Number 2674 Sodium Hexafluorosilicate Man Made Cryolite Powder , Pure UN Number 2674 Sodium Hexafluorosilicate Man Made Cryolite Powder , Pure UN Number 2674 Sodium Hexafluorosilicate

Large Image :  Man Made Cryolite Powder , Pure UN Number 2674 Sodium Hexafluorosilicate

Product Details:
Place of Origin: CHINA
Brand Name: YIXIN
Certification: ISO9001
Model Number: YXF-005
Payment & Shipping Terms:
Minimum Order Quantity: 1-25ton
Price: usd550-650/ton
Packaging Details: 50kg/bag
Delivery Time: 3-15days after received deposit
Payment Terms: L/C, T/T, Western Union,
Supply Ability: 1000 ton per month

Man Made Cryolite Powder , Pure UN Number 2674 Sodium Hexafluorosilicate

Description
Other Name: Salufer Appearance: Powder Or Granular
Molecular Weight: 188.06 Odor: Odorless
RTECS Number: VV8410000 UN Number: 2674
High Light:

sodium fluorosilicate

,

sodium hexafluorosilicate

Man-made cryolite powder sodium hexafluorosilicate UN number 2674 can use for wood preservation and insecticide

 

►Description 

  Sodium fluorosilicate appears as white crystal, crystalline powder or colorless

 

hexagonal crystals.It has many features . It is odorless and tasteless. Its relative

 

density is 2.68; it has moisture absorption capability. It can be dissolved in a solvent

 

such as ethyl ether but insoluble in alcohol. The solubility in acid is greater than that

 

in water. It can be decomposed in alkaline solution, generating sodium fluoride and

 

silica. After searing (300 ℃), it is decomposed into sodium fluoride and silicon

 

tetrafluoride. It is poisonous!In 25 degrees, the sodium fluorosilicate has its water

 

solubility being 0.78%. Upon production, addition of an excess amount of sodium

 

sulfate or sodium chloride can increase the concentration of sodium ions in the

 

system, thereby increasing the solubility product of fluorine silicate and sodium

 

ions, so that sodium fluoride can be subject to more complete precipitation. Sodium

 

fluorosilicate is the byproduct in the production of calcium phosphate or the

 

production of fluoride salt in aluminum factory. It generally appears as a white

 

crystalline powder with low solubility in water (being 1% or less at room

 

temperature), and the water solubility increases slightly with increasing

 

temperature. The aqueous solution of sodium fluorosilicate is acidic (pH3). This is

 

due to that its hydrolysis product contains hydrofluoric acid. Reduction of the

 

acidicity of the solution facilitates the hydrolysis of sodium fluorosilicate. When pH

 

is lower than 3.5-3.55, the hydrolysis reaction is stabilized. When the pH is equal to

 

4, the hydrolysis reaction rate is significant. When the pH value is equal to 8-8.5,

 

the sodium fluorosilicate can be completely hydrolyzed to exhibit as silica gel and

 

precipitated out. Therefore, when sodium fluorosilicate is added to the water glass,

 

in addition to hardening effect of precipitation of silicon dioxide gel caused by the

 

neutralization of the sodium hydroxide in the solution of water glass, the sodium

 

fluorosilicate itself is also a source of silica gel.

Specification

   Na2Si6                Item                 Specification
Na2SiF6 ≥99%
Fe ≤0.02%
Loss of Weight on drying at 105°C ≤0.40%
Insoluble in Water ≤0.50%
Free Acid(HCL) ≤0.15%
Heavy Metal(Pb) ≤0.05%
 

►Reactivity Profile

     Sodium 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.

►Health Hazard

 

     Inhalation of dust may irritate nose and throat. Ingestion causes symptoms

 

similar to fluoride poisoning; compound is highly toxic; initial symptoms include

 

nausea, cramps, vomiting, diarrhea, and dehydration; in severe cases, convulsions,

 

shock, and cyanosis are followed by death in 2-4 hr. Contact with eyes causes

 

irritation. Contact with skin causes rash, redness, and burning, sometimes followed

 

by ulcer formation.

►Storage characteristics

Treasury: ventilation, low-temperature and drying; store it separately from food and

 

acid.

Application 

 

 

1. The insecticide in agriculture.

 

2. Wood preservatives 

 

3. Man-made cryolite

Contact Details
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Contact Person: anny

Tel: +8613391072385

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