| Item | Standard | Result |
| Content（Na5P3O10）%≥ | 94.0 | 95.0 |
| Phosphorus pentoxide %≥ | 57.0 | 57.6 |
| Water-insoluble %≤ | 0.05 | 0.04 |
| Iron（Fe） %≤ | 0.01 | 0.007 |
| PH value（1% water solution） | 9.5-10.0 | 9.8 |
| Heavy metal (Pb) %≤ | 0.001 | 0.0006 |
| Arsenic (As) %≤ | 0.0003 | 0.0002 |
| Fluoride (F) %≤ | 0.003 | 0.003 |
| White content %≥ | 85.0 | 90.0 |
(1) STPP is used as one of the main auxiliaries for synthetic detergent, synergist for soap; water softener, tanning agent for leather making, auxiliary for dyeing;
(3) As an oil contamination resistance agent in paper production.
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