What Is Ammonium Thiosulfate?
A kind of white orthorhombic crystal with strong hygroscopicity. When heated to 150ºC, it will be decomposed into ammonium sulfite, sulfur, hydrogen sulfide and water. Very soluble in water, insoluble in alcohol and ether. Unstable in air.
| 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 | ≤ 0.001% | ≤ 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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