Physical state at 20 °C | Solid | Odour | Odorless |
Melting point/ Freezing point [°C] | 86 °C | Solubility in water [% weight] |
76.7 g/100 cc water @ 0C
|
Colour |
Red crystals
|
Density [g/cm3] | 1.525 |
pH value
|
4.6 | Boiling point [°C] | 110°C |
Appearance | Deep red crystals |
Assay (complexometric) | 97 – 102% |
Nitrate (NO3) | Max 0.05% |
Sulphate (SO4) | Max 0.05% |
Iron (Fe) | Max 0.05% |
Nickel (Ni) | Max 0.15% |
Zinc (Zn) | Max 0.1% |
Substance not precipitated by ammonium sulphide (as SO4) | Max 0.3% |