Sodium thiosulphate | back |
1, Chemical name: Sodium Thiosulphate
2, Structural formula:
3, Molecular formula: Na2S2O2·5H2O
2, Structural formula:
3, Molecular formula: Na2S2O2·5H2O
4. CAS NUMBER: 7772-98-7.
5, Molecular weight: 248.17
6, Properties: monoclinic crystal, Melting point : 40-45℃, Relative density :1.729(17℃).
7, Quality standard:
5, Molecular weight: 248.17
6, Properties: monoclinic crystal, Melting point : 40-45℃, Relative density :1.729(17℃).
7, Quality standard:
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Item
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Photographic grade
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Industrial grade
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Anhydrous grade
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Appearance
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colorless transparent crystal
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colorless transparent crystal
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white powder
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Assay
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≥99.00%
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≥98.5%
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≥97.0%
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Water Insoluble matter
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≤0.01%
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≤0.03%
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≤0.03%
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Sulfide
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≤0.001%
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≤0.003%
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≤0.001%
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Fe
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≤0.001%
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≤0.003%
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≤0.005%
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PH
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6.5~9.5
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6.5~9.5
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6.5~9.5
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Water solution reaction
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in accordance with the test
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in accordance with the test
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Granularity(g/g)
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12~16
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8, Uses: used in fixers, plating, leather, reductant, dechlorinating agent, sulfur dyeing agent, as a blush preventive agent, and as a disinfectant. and decolor agent
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