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| Impurities content (weight %) | |
|---|---|
| Insoluble in water substances | <0.03 |
| Acidity (CH3CH2COOH) | <0.3 |
| Residue after calcination | <0.02 |
| Sulfates (SO42-) | <0.02 |
| Chlorides (Cl-) | <0.01 |
| Heavy metals (Pb2+) | <0.001 |
| Crystallization point | 79 ºC |






