| Item | Specification | Results |
| Appearance | White or slight-yellow crystalline powder | Slight-yellow crystalline powder |
| Assay (As Na2S2O5) | > = 98.0% | 98.98% |
| Iron (As Fe) Clarity | < = 0.005% Slight - turbidity |
0.0028% Slight - turbidity |
| Heavy metals (As Pb) | < = 0.001% | < 0.001% |
| Arsenic | < = 0.0002% | < 0.0002% |
| PH | 4.91 | |
| Conclusion | Conform | |
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