| Analytical Items | Standard |
| Appearance | White crystalline powder |
| Assay | 99.0%~101.0% |
| Transmittance | ≥98.0% |
| pH | 5.0-6.0 |
| Specific Rotation | +24.0º±1.0 |
| Loss on drying | ≤ 0.2 % |
| Residue on ignition | ≤ 0.1% |
| Heavy Metals | ≤ 10ppm |
| Pb | ≤ 3 ppm |
| As | ≤ 1 ppm |
| Cd | ≤ 1ppm |
| Hg | ≤ 0.1ppm |
| Mesh | 95% pass through 60 Mesh |
| Bulk Density | ≥0.3g/ml |
| Tapped Density | ≥0.6g/ml |
| Sulphate | ≤ 0.02% |
| Ammonium | ≤ 0.02% |
| Iron | ≤ 0.001% |
| Other amino acids | Negative |
| Total plate count | ≤ 1000cfu/g |
| Yeast & Mold | ≤ 100cfu/g |
| Salmonella | Negative/10g |
|
E. Coli
|
Negative/1g |
| Staphyococcus | Negative/1g |