| Item | Limits |
| Appearance | White crystals or crystalline powder |
| Identification(IR) | Concordant with the reference spectrum |
| Assay % | 98.5~101.5 |
| PH | 5.5~7.0 |
| Specific rotation | +14.9°~+17.3° |
| Residue on Ignition % | ≤0.30 |
| Loss on drying % | ≤0.30 |
| Chloride (CL) % | ≤0.05 |
| Iron (Fe) % | ≤0.003 |
| Sulfate (SO4) % | ≤0.05 |
| Heavy metals, ppm | ≤15 |
| Lead (Pb) mg/kg | ≤0.5 |
| Arsenic (As) mg/kg | ≤1.0 |
| Cadmium (Cd) mg/kg | ≤1.0 |
| Mercury (Hg) mg/kg | ≤0.1 |
| Total plate count | ≤5000 |
| Yeast and Mold | ≤100 |
|
E. Coli
|
≤30 |
| Salmonella | Negative |
It is mainly used for
Biochemical reagent, belongs to the human body essential amino acid, mainly as a nutritional supplement, has the effect of lowering blood sugar and promoting growth
.