has the highest solubility rate compared to other phosphate sources. It is the only dry, strong acid in crystalline form. It contains 18% nitrogen (N) and 44% phosphorous (P2O5).
| Chemical Properties | |
| Total phosphorus content (P2O5) | 44% |
| Total phosphorus content (P) | 19.2% |
| Solubility | > 99.8% |
| Total nitrogen (N) | 18% |
| pH (1% solution) | 1.8 |
| EC (1 g/I at 25°C) | 1.22 mS/cm |
| Physical properties | |
| Appearance | Crystalline odourless powder |
| Colour | White |