Inspection items | The degree of the products | ||
Best Grade Products | Best Grade Products | First grade products | |
Main contents(counted with H3PO3) | 99 | 98.5 | 98 |
Iron(counted with Fe) | 0.001 | 0.0015 | 0.0020 |
Chloride(counted with C1) | 0.008 | 0.01 | 0.01 |
Sulfate(counted with SO4) | 0.001 | 0.002 | 0.002 |
Phosphate(counted with SO4) | 0.1 | 0.2 | 0.2 |
Complexion | White crystal | White crystal | White crystal |
Water solution experiments | White crystal | Clear and achromatic | Clear and achromatic |