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    Sodium Thiosulphate

  • 5000mt/Month
  • L/C, T/T
  • Tianjin, China
  • 10102-17-7
  • Specification:

    Na2S2O3 99.0% min

    Insolubles in water 0.01% max

    Na2S 0.003%max

    Fe 0.003%max

    Particle size (grain/gram) 15-18

    Item
    Photographic grade
    Industrial grade
    Anhydrous grade
    Appearance
    colorless transparent crystal
    Colorless transparent crystal
    white powder
    Assay
    ≥99.00%
    ≥98.5%
    ≥97.0%
    Water Insoluble matter
    ≤0.01%
    ≤0.03%
    ≤0.03%
    Sulfide
    ≤0.001%
    ≤0.003%
    ≤0.001%
    Fe
    ≤0.001%
    ≤0.003%
    ≤0.005%
    PH
    6.5~9.5
    6.5~9.5
    6.5~9.5
    Water solution reaction
    in accordance with the test
    in accordance with the test
    ----
    Granularity(g/g)
    12~16
    ---
    ----


    Sodium Hyposulfite; Sodium Thiosulphate; Sodium Hyposulphite

    Molecular formula: Na2S2O3.5H2O
    Molecular Weight: 248.17
    Application: used as photo fixing solution, dechlorination agent and printing and dyeing assistant after bleaching cotton fabric, also used in medicine, electroplating, tanning, metallurgy, dyestuff and so on
    Packing storage: packing with woven bag lined with polyethylene plastic bag or wooden barrel.The net weight per bag (drum) is 25kg or 50kg.Containers must be sealed.Store in a cool and dry warehouse, prevent from being exposed to the sun and rain during transportation.It should not be stored and transported together with acids and oxidants.Prevent moisture from melting.If the package is damp, it means that the contents have become desiccated and must be stacked separately from the dry package.Can not be stored in the open air, on the damp package to handle.In case of fire, water and sand can be used.
    Physicochemical properties: white monoclinic crystal.No smell, cool and bitter taste.Relative density 1.729 (17ºC).Melting point 40 ~ 45ºC.Heat to 100ºC and lose 5 crystalline water.Soluble in water, aqueous solution nearly neutral.Soluble in turpentine and ammonia.Insoluble in alcohol.Deliquescence in moist air.Easy weathering in dry air above 33ºC.It's reductive.It dissolves halogens and silver salts.



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