Specification
| Specific rotation | +39.5°to +41.5° |
| State of solution (transmittance) | Clear 98.0% min |
| Chloride (Cl) | 0.02% max |
| Ammonium (NH4) | 0.02% max |
| Sulfate (SO4) | 0.02% max |
| Iron (Fe) | 10ppm max |
| Heavy metal (Pb) | 10ppm max |
| Arsenic (As2O3) | 1ppm max |
| Other amino acids | Chromatographically not detected |
| Loss on drying | 0.2% max. |
| Assay 99% min. | Assay 99% min. |