Physical state at 20 °C | Solid | Odour | Odorless |
Melting point/ Freezing point [°C] | 1605°C | Solubility in water [% weight] | Slightly soluble in water |
Colour | White powder | Density [g/cm3] | 3.96 |
Appearance | White powder or crystals |
Assay | Min 98% |
Loss on ignition (20 min.; 400°C) | Max 1.5% |
Akalis (as SO4) | Max 1.0% |
Chloride (Cl) | Max 0.005% |
Iron (Fe) | Max 0.003% |