| Detailed Description: |
1, Chemical name: Sodium thiosulfate
2, Structural formula:
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3, Molecular formula: Na2S2O2·5H2O
4, Molecular weight: 248.17
5, Properties: monoclinic crystal, Melting point : 40-45℃, Relative density :1.729(17℃).
6, 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
|
≥99.00%
|
≥98.5%
|
≥97.0%
|
|
Water Insoluble matter
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≤0.01%
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≤0.03%
|
≤0.03%
|
|
Sulfide
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≤0.001%
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≤0.003%
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≤0.001%
|
|
Fe
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≤0.001%
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≤0.003%
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≤0.005%
|
|
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
|
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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7, Packing:25kg, 50kg plastic woven bag, or following your demand g.
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 |
