| Name of index | GB25558-2010 | FCC-V | E 341 (iii) |
| Appearance | white floating, amorphous powder | ||
| C ontent,% | 34.0-40.0( as Ca) | 34.0-40.0( as Ca) | ≥ 90(on the ignited basis) |
| P2O5(on the Anhydrous basis) ,% | - | - | 38.5--48.0 |
| Identification | - | - | Positive tests for calcium and for phosphate |
| As,≤ % | 0.0003 | 0.0003 | 0.0001 |
| F,≤ % | 0.0075 | 0.0075 | 0.005 |
| Heavy metals(Pb),≤% | 0.001 | - | - |
| Pb,≤ % | 0.0002 | 0.0002 | 0.0001 |
| Cadmium,≤ % | - | - | 0.0001 |
| Mercury,≤ % | - | - | 0.0001 |
| Aluminium, ≤ mg/kg | - | - | 200 |
| Loss on Ignition(800ºC) ≤ % | 10.0 | 10.0 | 8.0(800 °C ± 25 °C,0.5 hour) |
| Clear grade | Slightly turbid | - | - |