SPECIFICATION
| Appearance | White to off-white crystalline powder |
| Identification | In accordance with standard retention time |
| Optical rotation | +16.5°~ +18.5° |
| Solubility | Clear |
| PH | 5.5～7.0 |
| Loss on drying | Not more than 1.0% |
| Hydrate | Not more than 6.8% |
| Residue on ignition | Not more than 0.2% |
| Chloride | Not more than 0.05% |
| Iron | Not more than 10ppm |
| Heavy Metal | Not more than 10ppm |
| Lead | Not more than 1ppm |
| Total mercury | Not more than 0.1ppm |
| Cadmium | Not more than 1ppm |
| Arsenic | Not more than 1ppm |
| Assay | 98.0～102.0% |
| L-Arginine | 65.5～69.0% |
| α-Ketoglutarate | 26.5～29.0% |
| Total plate counts | Not more than 1000CFU/g |
| Yeast and Mould | Not more than 100 CFU/g |
| E.coli | Absence |
| Salmonella | Absence |
| Staphylococcus Aureus | Absence |
MOLECULAR STRUCTURE：
Molecular Formula: C17H34N8O9
