| Tests | Specifications |
| Appearance | White Crystalline powder |
| Identity | Corresponds |
| Assay | 99.5-100.3% |
| Melting temperature | 234.0-237.0°C |
| Loss on Drying(1h,105°C) | ≤0.20% |
| Residue on ignition(USP) | ≤0.10% |
| Heavy metals(as Pb) | ≤20ppm |
| Chloride | ≤200 ppm |
| Sulfate | ≤200 ppm |
| Related substances | ≤0.5% |
| Ordinary impurities | ≤2.0% |








