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Impurities content (weight %) | |
---|---|
Insoluble in water substances | <0.02 |
Chlorides (Cl-) | <0.002 |
Iron (Fe2+) | <0.001 |
Sodium + Potassium (Na+ + K+) | <0.075 |
Calcium + Strontium (Ca2+ + Sr2+) | <0.2 |
Heavy metals (Pb2+) | <0.002 |