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| Impurities content (weight %) | |
|---|---|
| Insoluble in water substances | <0.001 |
| Sulfates (SO42-) | <0.001 |
| Nitartes (NO3-) | <0.001 |
| Iron (Fe2+) | <0.0002 |
| Sodium+Potassium+Calcium (K++Na++Ca2+) | <0.0001 |
| Arsenic (As3+) | <0.000005 |
| Heavy metals (Pb2+) | <0.000005 |



