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Impurities content (weight %) | |
---|---|
Insoluble in HCl substances | <0.005 |
Barium carbonate (BaCO3) | <1.0 |
Sulfides (S2-) | <0.0002 |
Chlorides (Cl-) | <0.001 |
Iron (Fe2+) | <0.0005 |
Sodium+Potassium+Calcium (K++Na++Ca2+) | <0.02 |
Heavy metals (Pb2+) | <0.0005 |