| ITEMS | Standards |
| Assay %≥ | 99.0-100.5 |
| Water %≤ | 7.5～8.8 |
| Readily Carbonisable Substances %≤ | 1.0 |
| Sulphated Ash (Residue on Ignition) %≤ | 0.05 |
| Sulfate mg/kg ≤ | 150 |
| Oxalate mg/kg ≤ | 100 |
| Lead (Pb) mg/kg ≤ | 0.5 |
| Arsenic (As) mg/kg ≤ | 1 |
| Mercury mg/kg ≤ | 1 |
| Aluminum mg/kg ≤ | 0.2 |
| Heavy Metals (as Pb) mg/kg ≤ | 10 |
| Bacteria Endotoxin mg/kg ≤ | 0.5 |
