China Pure Borax Powder manufacturer
Shanghai Yixin Chemical Co., Ltd.

Only quality posesses market, improvement gets progress



Home ProductsSodium Silicate Fluoride

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



      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.


       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






    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
    Mobile Site Privacy Policy China Good Quality Pure Borax Powder Supplier. © 2017 - 2020 All Rights Reserved.