Sodium thiosulphate

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1, Chemical name: Sodium Thiosulphate
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°ś, Relative density :1.729(17°ś).
7, Quality standard:

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
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Granularity(g/g)
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


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