| Test item | FCC | E 170 | |
| Identification | Passes test | Passes test | |
| Assay(dry basis) | 98.0-100.5 % | ≥98.0 % | |
| Loss on drying | ≤ | 2.0 % | 2.0 % |
| Acid-insoluble substances | ≤ | 0.2 % | 0.2 % |
| Magnesium and alkali salts | ≤ | 1.0 % | 1.0 % |
| Fluoride | ≤ | 0.005 % | 50 mg/kg |
| Arsenic | ≤ | 3.0 mg/kg | 3.0 mg/kg |
| Lead | ≤ | 3.0 mg/kg | 3.0 mg/kg |
| Cadmium | ≤ | --- | 1.0 mg/kg |
| Sb+Cu+Cr+Zn+Ba | ≤ | --- | 100.0 mg/kg |