Physical state at 20 °C | Solid | Odour | Odorless |
Melting point/ Freezing point [°C] | 39 – 41 °C | Solubility in water [% weight] | 482.2 g/l at 20 °C |
Colour | Pale violet crystals | Density [g/cm3] | 1.71 |
pH value | 1 |
Appearance | Pale violet crystals |
Assay (iodometric) | 98.5 – 102% |
Insoluble matter | Max 0.01% |
Chloride (Cl) | Max 0.001% |
Ferrous ion (Fe2+) | Passes test (about 0.001%) |
Nitrate (NO3) | Max 0.01% |
Calcium (Ca) | Max 0.01% |
Magnesium (Mg) | Max 0.005% |
Potassium (K) | Max 0.005% |
Sodium (Na) | Max 0.02% |
Copper (Cu) | Max 0.003% |
Zinc (Zn) | Max 0.003% |