Physical state at 20 °C | Solid | Odour | Odorless |
Melting point/ Freezing point [°C] | 340°C | Solubility in water [% weight] | Soluble in water |
Colour | White crystalline | pH value | 4.5 – 5.5 |
Appearance | White crystalline powder |
Assay (as NH4Cl; on anhydrous basis) | Min 99.5% |
pH (5% solution in water; 25°C) | 4.5 – 5.5 |
Insoluble matter (10% in water) | Max 0.005% |
Residue on ignition | Max 0.01% |
Calcium (Ca) | Max 0.001% |
Magnesium (Mg) | Max 0.0005 % |
Heavy metals (by ICP-OES) | Max 0.0005% |
Iron (Fe) | Max 0.0002% |
Phosphate (PO4) | Max 0.0002% |
Sulphate (SO4) | Max 0.002% |