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| Impurities content (weight %) | |
|---|---|
| Residue after calcination in the form of sulfates | <0.05 | 
| Humidity | <0.5 | 
| Oxalates (C2O42-) | <0.01 | 
| Sulfates (SO42-) | <0.015 | 
| Aluminum (Al3+) | <0.00002 | 
| Calcium (Ca2+) | <0.02 | 
| Arsenic (As3+) | <0.0001 | 
| Mercury (Hg2+) | <0,0001 | 
| Lead (Pb2+) | <0,0001 | 
| Heavy metals (Pb2+) | <0.0002 | 
| Bacterial contamination | < 0,5 МЕ/мг | 

 
      



