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Impurities content (weight %) | |
---|---|
Insoluble in HCl substances | <0.005 |
Sulfates (SO42-) | <0.005 |
Iron (Fe2+) | <0.001 |
Potassium + Sodium + Calcium (K+ + Na+ + Ca2+) | <0.01 |
Arsenic (As3+) | <0.0005 |
Lead (Pb2+) | <0.001 |