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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
  • 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
    Contact Now
    Detailed Product 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
    Shanghai Yixin Chemical Co., Ltd.

    Contact Person: anny

    Send your inquiry directly to us
    Shanghai Yixin Chemical Co., Ltd.
    No .818 Tianzhu Rd ,Jiading District ,Shanghai ,China
    Tel:86-21-59159725
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