| Item | Specification |
| Appearance | White crystalline powder |
| Assay (on dry basis) | 99.5-100.5% |
| Loss on drying | ≤ 0.20% |
| PH | 5.0-7.0 |
| Reducing Sugars | ≤ 0.3 % |
| Ribitol and glycerol | ≤ 0.1 % |
| Melting range | 118~122 ºC |
| Ash | ≤ 0.1 % |
| Heavy metal(pb) | ≤ 1.0 mg/kg |
| Arsenic(count as As) | ≤ 0.3 mg/kg |
| Lead(Pb) | ≤ 1.0 mg/kg |
| Bacterium total | ≤ 300 cfu/g |
| E.Coli | ≤ 30 MPN/100g |