
| Items | Specifications |
| Appearance | White crystalline powder |
| State of solution (Transmittance) | Clear and colorless not less than 98.0% |
| Specific optical rotation | +31.5o ~ +32.5o |
| Assay ,% min | 99.0 ~ 100.5 |
| Loss on drying,% max | 0.2 |
| Heavy metals (as Pb) max | 10ppm |
| PH value (5% in water) | 3.0~3.5 |
| Residue on ignition,% max | 0.1 |
| Chloride ,%(as Cl) max | 0.02 |
| Sulfate(SO4),%(as SO4) max | 0.02 |
| Iron(as Fe), max | 10ppm |
| Other amino acids | Accord with specifications |
| Arsenic(as As2O3), max | 1ppm |
| Ammonium(as NH4),% max | 0.02 |