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Impurities content (weight %) | |
---|---|
Chlorides (Cl-) | <0.1 |
Iron (Fe2+) | <0.003 |
Arsenic (As3+) | <0.04 |
Potassium + Calcium + Sodium (K+ + Ca2+ + Na+) | <0.03 |
Lead (Pb2+) | <0.03 |