| Item | Indicatoren op industrieel niveau | ||
| Superieure I | Niveau I II | Secundaire III | |
| Trisodium fosfaat (Na3PO4.12H2O)%≥ | 98.5 | 98.0 | 95.0 |
| Methyl oranje alkaliteit% | 16.5-19.0 | 16.0-19.0 | 15.5-19.0 |
| Water onoplosbare stof%≤ | 0.05 | 0.10 | 0.30 |
| sulfaat%≤ | 0.50 | 0.50 | 0.80 |
| chloride%≤ | 0.30 | 0.40 | 0.50 |
| PH-waarde | 11.5-12.5 | ||
| frees%≤ | 0.01 | 0.01 | 0.01 |
| arsenicum%≤ | 0.005 | 0.05 | 0.05 |