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| Impurities content (weight %) | |
|---|---|
| Insoluble in water substances | <0.005 |
| Lanthanum (La3+) | <0.005 |
| Neodymium (Nd3+) | <0.05 |
| Cerium (Ce3+) | <0.005 |
| Sulfates (SO42-) | <0.0001 |
| Calcium (Ca2+) | <0.005 |
| Iron (Fe2+) | <0.002 |
| Copper (Cu2+) | <0.002 |
| pH of 5% water solution | 3 - 4 |



