Ammonium Thiosulphate
1. Chemical name:Ammonium Thiosulphate
2. Structural formula:
3. Molecular formula:(NH4)2S2O3
4. Molecular weight:148.20
5. Properties:. Colorless transparent liquid or white crystal. Relative density of crystal: 1.679,easily soluble in water,insoluble in alcohol, ether,slightly soluble in acetone.
6. Quality standard:
Index name |
Liquid |
Solid |
Assay |
56~60% |
≥98% |
Appearance |
colorless transparent Liquid |
white crystal |
Ammonium sulfite |
≤1.0% |
≤1.0% |
Alkalinity |
0.3~1.5% |
≤0.4% |
Insoluble matter ( precipitation of Ca and Mg) |
≤0.2% |
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Heavy metals(as Pb) |
≤0.001% |
≤0.002% |
Fe |
≤0.00025% |
≤0.001% |
Sulfide(as s) |
≤0.0002% |
≤0.0002% |
Ignition residual
|
≤0.1% |
≤0. 2% |
Specific gravity |
1.310~1.335 |
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7. Packing: Liquid 250kg plastic drum. Solid 25KG plastic woven bag.
8.Uses: Used as fixer for takingPhotographic s,key component of silvering electrobath, shielding effect agent, casting protectant of Al-Mg alloy, bactericide and analytical reagent. |
