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Impurities content (weight %) | |
---|---|
Selenous acid (H2SeO3) | <0.1 |
Sulfates (SO42-) | <0.03 |
Chlorides (Cl-) | <0.005 |
Potassium + Sodium + Calcium (K+ + Na+ + Ca2+) | <0.01 |
Iron (Fe2+) | <0.01 |
Heavy metals (Pb2+) | <0.01 |