| Project name | Standar indicators | Test results |
| NH4Al(SO4)2·12H2O | 99.5-100.5 | 99.8 |
| Moisture | ≤4 | 0.96 |
| Water insoluble matter | ≤0.2 | 0 |
| As | 2 | <2 |
| Heavy metal(pb) | ≤20 | <20 |
| Pb | ≤10 | <10 |
| Fluoride(F) | ≤30 | <30 |
| Se | ≤30 | <30 |
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The product shall be sealed and stored in the dry and ventilated place to prevent from rain, high temperature and strong sunlight.
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