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Impurities content (weight %) | |
---|---|
Sulfates (SO42-) | <0.03 |
Iron (Fe2+) | <0.005 |
Silicon dioxide (SiO2) | <0.02 |
Cadmium (Cd2+) | <0.0001 |
Copper (Cu2+) | <0.0001 |
Arsenic (As3+) | <0.0001 |
Nickel (Ni2+) | <0.0005 |
Tin (Sn4+) | <0.0005 |
Mercury (Hg2+) | <0.0001 |
Lead (Pb2+) | <0.0005 |
Tantalum (Ta5+) | <0.001 |
Zinc (Zn2+) | <0.0002 |