| Item | Standard | Results | |
| Appearance | White or whitelike granular powder | Conform | |
| Assay(%) | ≥50 | 50.7 | |
| Identification | Positive | Conform | |
| Loss on drying(%) | ≤5.0 | 2.0 | |
| Sieve analysis | ≥90% through sieve No.20 (US) | 99.9% | |
| Heavy metals | ≤10mg/kg | ＜10mg/kg | |
| Arsenic | ≤2mg/kg | ＜2mg/kg | |
| Pb | ≤2mg/kg | ＜2mg/kg | |
