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    • Sodium Thiosulfate

    Sodium Thiosulfate

    Chemical Name: Sodium Thiosulfate
    Molecular Formula: Na2S2O3·5H2O
    Molecular Weight: 248.19
    CAS No. : 7772-98-7
    Standard Executed: HG/T 2328-2006

    Appearance
    Colorless or slightly yellowish transparent crystals.

    Application
    • Used in leather, paper, printing and dyeing, mining and aquaculture.

    Packing
    • Net weight： 25，50，150kg；
    • PP woven bags or paper-plastic composite bag, with inner PE  bag.

    Specification

    Item

    Standard

    High-Class

    First-Class

    Sodium thiosulfate (Na2S2O3- 5H2O),ω/  ≥ 

    99.0

    98.0

    Water insoluble matter ω/%             ≤

    0.01

    0.03

    Sulfide (as Na2S) ω/%                  ≤

    0.001

    0.003

    Iron (Fe) ω/%                         ≤

    0.002

            0.003

    Chloride (as NaCl) ω/%                 ≤

    0.05

    0.20

    PH (200g/L solution)

    6.5-9.5

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