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Ammonium Thiosulphate

1.Chemcial name:Ammonium Thiosulphate
2.Structural formula:

3.Molecular formula: (NH4)2S2O3
4.Molecular weight:148.20
5.Physical and chemical properties: colorless transparent liquid or white crystal. Relative density 1.679. Easily soluble in water, solubility in water at 100℃ is 103.3g/100ml. Insoluble in alcohol and ether, slightly soluble in acetone.
6.Quality index:

Item
Liquid index
Solid index
Content
56~60%
≥98%
Appearance
colorless transparent liquid
white crystal
Ammonium sulfite
≤1.0%
≤1.0%
Alkalinity
0.3~1.5%
≤0.4%
Insoluble substance (calcium and magnesium sediments)
≤0.2%
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Heavy metal (Pb)
≤0.001%
≤0.002%
Iron (Fe)
≤0.00025%
≤0.001%
Sulfide (sulfur)
≤0.0002%
≤0.0002%
Ignition residue
≤0.1%
≤0. 2%
Specific gravity
1.310~1.335
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7.Packing: liquid is packed by 250kg plastic drum. Solid is packed by 25KG plastic woven bag.
8.Uses: as fixing agent in photographic industry, as fungicide and analytical reagent in pharmaceutical industry.

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