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Impurities content (weight %) | |
---|---|
Insoluble in water substances | <0.01 |
Total nitrogen (N) | <0.005 |
Sulfates (SO42-) | <0.003 |
Germanium (Ge4+) | <0.0001 |
Iron (Fe2+) | <0.001 |
Copper (Cu2+) | <0.003 |
Nickel (Ni2+) | <0.001 |
Tin (Sn4+) | <0.0005 |
Lead (Pb2+) | <0.001 |
Silver (Ag+) | <0.0005 |
pH of 5% water solution | 3,0 - 4,0 |