Assay (dry substance) | ≥99 % |
Appearance of solution | complies |
pH value (10 % solution) | 3.4 - 3.8 |
Chloride (Cl) | ≤0.005 % |
Sulphate (SO4) | ≤0.015 % |
Oxalate (as C2H2O4) | ≤0.03 % |
Heavy metals (as Pb) | ≤0.001 % |
Reaction with H2SO4 | complies |
Loss on drying (120 °C) | ≤0.4 % |