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Impurities content (weight %) | |
---|---|
Insoluble in deluted H2SO4 substances | <0.03 |
Nitrates (NO3-) | <0.01 |
Chlorides (Cl-) | <0.03 |
Iron (Fe2+) | <0.0005 |
Mercury(I) (Hg+) | <0.05 |
Free sulfuric acid (H2SO4) | <0.5 |
Lead (Pb2+) | <0.001 |