Sodium Tungstate
1.Impurity Content
| Type | Grade1 | Grade2 | Grade3 | |
| The content of (%) | Sodium tungstate | 98.5 | 98.00 | 96.00 |
| Water insoluble | 0.01 | 0.010 | 0.500 | |
| Chioride | 0.001 | 0.003 | -- | |
| Sulfate | 0.02 | 0.050 | -- | |
| Arsenic | 0.001 | 0.002 | -- | |
| Ferrum | 0.002 | 0.005 | 0.100 | |
| Molybdenum | 0.03 | 0.050 | 0.500 | |
| Copper | 0.003 | 0.001 | 0.500 | |
| Heavy metal | 0.002 | 0.005 | -- | |
| PH value | 8.5-9 | 8.5-9 | -- | |
| Liquid water content | 11-13 | -- | -- | |
2.Packing
cardboard barrels or colored plastic barrels, double lining of polyethylene bags, 25kg,50kg per each.
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