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Impurities content (weight %) | |
---|---|
pH of 10%-water solution | 7,0 - 9,0 |
Sulfates (SO42-) | <0.005 |
Chlorides (Cl-) | <0.002 |
Ammonium salts (NH4+) | <0.01 |
Heavy metals (Pb2+) | <0.0001 |
Residue after calcination in the form of sulfates | <0.05 |