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Impurities content (weight %) | |
---|---|
Chlorides (Cl-) | <0.003 |
Sulfates (SO42-) | <0.004 |
Iron (Fe) | <0.001 |
Calcium (Ca) | <0.02 |
Potassium (K) | <0.02 |
Silicon dioxide (SiO2) | <0.015 |
Heavy metals (Pb) | <0.001 |