| Items | Standard |
| Characteristics | A white crystalline powder or colourless crystals or white pearls, freely soluble in water. Practically insoluble in alcohol and in ether. |
| Identification | Positive |
| Loss on drying | ≤ 1.0% |
| Acidity/alkalinity | Conform |
| Appearance of solution | Conform |
| Barium | Conform |
| Iron | ≤ 0.002% |
| Magnesium and alkaline-earth metals | ≤ 0.02% |
| Bromides | ≤ 0.1% |
| Iodides | Conform |
| Sulphate | ≤ 0.03% |
| Heavy metals | ≤ 0.001% |
| Aluminium | ≤ 0.0001% |
| Sodium | ≤ 0.1% |
| Arsen | ≤ 0.0001% |
| Bacterial endotoxins | ≤ 0.25EU/ml |
| Microbial limit | ≤ 500cfu/g |
| Assay | 99.0%~100.5% |
| Item | Standard | Test results |
| KCL(Dry base meter) | ≥99.0% | 99.50% |
| Loss on drying | ≤1.0% | 0.85% |
| Ph | Pass test | Pass test |
| Iodine and bromine | Pass test | Pass test |
| Na | ≤0.5% | 0.4% |
| Heavy metal(As Pb) | ≤5mg/kg | 4.5mg/kg |
| As | ≤2mg/kg | 1.5mg/kg |
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