| TESTING ITEMS | SPECIFICATIONS | RESULTS |
| Appearance | Light green crystalline powder | Conforms |
| Heave metals | ≤0.002% | 0.0003% |
| Arsenic | ≤0.0002% | 0.0001% |
| Water insoluble matter | ≤0.05% | 0.0003% |
| FeSO4 | ≥91.0% | 91.26% |
| Conclusion: The Product Conforms to Enterprise Standard. |
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