Physical state at 20 °C | Solid | Odour | Odorless |
Melting point/ Freezing point [°C] | 93.5 °C | Solubility in water [% weight] | 14% in water |
Colour | White powder | Density [g/cm3] | 1.65 |
pH value | 2.6 | Boiling point [°C] | 280°C |
Appearance | White crystalline powder |
Assay | 98-102% |
Phosphate (PO4) | Max 0.0025% |
Insoluble matter | Max 0.005% |
Reaction | Not less than pH 3.0 |
Chloride (Cl) | Max 0.001% |
Nitrate (NO3) | Max 0.001% |
Silicate (SiO3) | Max 0.002% |
Arsenic (As) | Max 0.00005% |
Copper (Cu) | Max 0.0005% |
Iron (Fe) | Max 0.001% |
Heavy metal (as Pb) | Max 0.001% |