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| Formula | MgSO4·H2O |
| Molecular weight | 138.38 |
| CAS | 22189-08-8 |
| Properties | Grayish white granular or powder; easily absorbing moisture from air to become deliquescent. |
| Uses | In Agriculture: Mainly used in mixed fertilizer or directly used as fertilizer for rubber, palm trees; Other Industries: Used in tanning, porcelain, and pigments. |
| Packing | In 25/50/500/1000kg PP/PE bag or on customer request. |
| Inspection Items | Unit | Grades | |||||
| Natural | Synthetic | ||||||
| Fertilizer | Feed | Powder | Granular | ||||
| Purity | %≥ | 91.0 | — | — | — | 21.0 | 21.0 |
| MgO | %≥ | 26.5 | 26.5 | — | — | 26.5 | 25.0 |
| Mg | %≥ | — | — | 16.5 | 15.9 | 26.5 | 25.0 |
| S | %≥ | 21.0 | 21.0 | 21.5 | 20.8 | 21.0 | 16.0 |
| Moisture | %≤ | 3.0 | 3.0 | 5.5 | 3.0 | 4.0 | 5.0 |
| Cl | %≤ | 1.5 | — | 0.30 | 0.30 | — | — |
| As | %≤ | — | — | 0.0002 | 0.0002 | — | — |
| Heavy Metals (As Pb) | %≤ | — | — | 0.001 | 0.001 | — | — |
| Cr | — | — | — | 0.001 | 0.001 | — | 1.5-4mm≥85% |