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| ITEMS | STANDARDs |
| Main content % >=</td> | 99.0 |
| Phosphorus pentoxide % >=</td> | 51.5 |
| K2O % >=</td> | 33.9 |
| PH value of 1% solution | 4.3-4.7 |
| Moisture % =< | 0.3 |
| Water insoluble % =< | 0.1 |