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| Impurities content (weight %) | |
|---|---|
| Sulfates (SO42-) | <0.01 |
| Chlorides (Cl-) | <0.005 |
| Aluminum (Al3+) | <0.001 |
| Iron (Fe2+) | <0.001 |
| Indium (In3+) | <0.01 |
| Cobalt (Co2+) | <0.005 |
| Manganese (Mn2+) | <0.005 |
| Copper (Cu2+) | <0.005 |
| Sodium + Potassium + Calcium (Na+ + K+ + Ca2+) | <0.001 |
| Nickel (Ni2+) | <0.0005 |
| Tin (Sn2+) | <0.0001 |
| Lead (Pb2+) | <0.0005 |
| Silver (Ag+) | <0.0001 |
| Zinc (Zn2+) | <0.0001 |
| pH of 5%-water solution | 2 - 3 |



