- Place of Origin: China (Mainland)
Used as fixer for takingPhotographic s,key component of silvering electrobath, shielding effect agent, casting protectant of Al-
Chemical name:Ammonium Thiosulphate
Molecular formula:(NH4)2S2O3
Molecular weight:148.20
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.
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% | --- |
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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