| Items | Specification |
| Appearance | A white crystalline powder |
| Identification | Meets the requirements |
| Melting Point | 156 ~ 162º C |
| Loss on Drying | ≤ 0.5% |
| Residue on Ignition | ≤ 0.2% |
| Heavy Metals | ≤ 0.002% |
| Related Substances | ≤ 1.0% |
| Assay | ≥ 99.0% |
| Standard | Factory Standard |