| Item | Specifications | Results |
| Appearance | White crystalline powder | Conforms |
| As | ≤30ppm | <30ppm |
| Residue on ignition | ≤0.1% | 0.05% |
| Heavy metal(Pb) | ≤15ppm | <15ppm |
| Assay | ≥99.0% | 99.3% |
| Loss on drying | ≤0.30% | 0.14% |
| Brand name | Fousi chemical |
Packing: 25kg/drum, foil bag
Stored in a sealed dark dry cool place