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| Impurities content (weight %) | |
|---|---|
| Chlorides + Chlorates (Cl- + ClO3-) | <0.004 |
| Sulfates (SO42-) | <0.002 |
| Aluminum (Al3+) | <0.0001 |
| Vanadium (V5+) | <0.00002 |
| Potassium (K+) | <0.001 |
| Calcium (Ca2+) | <0.0005 |
| Cobalt (Co2+) | <0.000005 |
| Magnesium (Mg2+) | <0.0001 |
| Manganese (Mn2+) | <0.000005 |
| Copper (Cu2+) | <0.00001 |
| Sodium (Na+) | <0.001 |
| Nickel (Ni2+) | <0.000005 |
| Tin (Sn4+) | <0.00001 |
| Lead (Pb2+) | <0.00003 |
| Silver (Ag+) | <0.00001 |
| Antimony (Sb3+) | <0.00001 |
| Chromium (Cr3+) | <0.00001 |
| Cesium (Cs+) | <0.001 |




