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Impurities content (weight %) | |
---|---|
Insoluble in HCl substances | <0.005 |
Sulfates (SO42-) | <0.0025 |
Ammonium salts (NH4+) | <0.003 |
Arsenic (As3+) | <0.0001 |
Iron (Fe2+) | <0.002 |
Sodium + Potassium + Calcium + Magnesium (Na++K++Ca2++Mg2+) | <0.01 |
Lead + Cadmium + Copper + Zinc (Pb2++Cd2++Cu2++Zn2+) | <0.005 |