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| Impurities content (weight %) | |
|---|---|
| Total Nickel (Ni) gravimetric analysis | >77.2% |
| Insoluble in HCl substances | <0.05 |
| Sulfates (SO42-) | <0.3 |
| Iron (Fe2+) | <0.01 |
| Cobalt (Co2+) | <0.1 |
| Lead + Copper (Pb2+ + Cu2+) | <0.02 |
| Sodium + Potassium + Calcium (Na+ + K+ + Ca2+) | <0.4 |



