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%
|
---
|
|
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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