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地址：武汉市江岸区后湖大道汉口城市广场C区3号楼1013
网址：www.zoyochem.com
| Item | STANDARD |
| Appearance | White crystals or crystalline powder |
| Assay(%) | 99.0 - 101.0 |
| Loss on drying(%) | 0.20 Max |
| Residue on ignition(%) | 0.10 Max |
| pH | 7.0~8.5 |
| Specific rotation(°) | +12.0 - +12.8 |
| State of solution(%) | 98.0 Min |
| Chloride(%) | 0.020 Max |
| Ammonium(%) | 0.02 Max |
| Sulfate(%) | 0.020 Max |
| Iron(ppm) | 10 Max |
| Heavy metals(ppm) | 10 Max |
| Arsenic(ppm) | 1 Max |
