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        Langfang Tianke Biotechnology
        Professional production base of general chemical reagent and pharmaceutical accessories
        Hotline:+86-15076659665
        Products
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        Sodium tungstate

        Sodium tungstate

        Molecular formula: Na2WO4·2H2O
        Molecular weight: 329.87
        Properties: Colorless crystal or white crystalline powder. Weathering in the dry air. It loses water of crystallization if heated to 100℃. Relative density is 3.245. Melting point is 692℃ (anhydride). Soluble in water and insoluble in alcohol.
        Uses: As analytical reagent, alkaloid precipitant, water-proofing and fire-proofing agent for fabrics. It can be used in preparing metal tungsen and other tungsen compounds.
        Standard: The maximum content of impurities is in percentage content

        Standard/item

        Analytical pure-AR

        Chemical pure-CP

        Assay[Na2WO4·2H2O] /% 

        ≥99.5

        ≥99.0

        Water insoluble matter/%

        ≤0.01

        ≤0.02

        Alkalinity

        Qualified

        Qualified

        Chloride(Cl) /%

        ≤0.005

        ≤0.007

        Sulfate(SO4) /%

        ≤0.01

        ≤0.02

        Nitrogen compound (N) /%

        ≤0.001

        ≤0.004

        Arsenic (As)/%

        ≤0.0005

        ≤0.0005

        Iron (Fe)/%

        ≤0.0005

        ≤0.001

        Heavy metal(Pb) /%

        ≤0.0005

        ≤0.002

        Molybdenum (Mo)

        ≤0.001

        ≤0.005

        Packing: Woven bag, kraft bag or fiber drum lined with plastic, net weight is 25kg.

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        Langfang Tianke Biotechnology Co., Ltd.
        Add: Sanghang Industrial Park, Dacheng County,
        Hebei, China
        Tel:+86-15076659665 Manager Ma
        Fax:+86-316-5569332?
        E-mail:ytty08@163.com
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