产品展示
优质供应
详细内容
| Item | Standard |
| Appearance | White crystals or crystalline powder |
| Specific rotation[α]20/D (C=4,H2O) | +25.8 to +27.0° |
| State of solution (Transmittance) | Clear ａnd colorless |
| Chloride (Cl) | Not more than 0.020% |
| Ammonium (NH4) | Not more than 0.02% |
| Sulfate (SO4) | Not more than 0.020% |
| Iron (Fe) | Not more than 10ppm |
| Heavy metal(Pb) | Not more than 10ppm |
| Arsenic(As2O3) | Not more than 1ppm |
| Other amino acids | No spot |
| Loss on drying | Not more than 0.20% |
| Residue on ignition(sulfated) | Not more than 0.10% |
| Assay | 98.5 to101.0% |
| pH | 2.0 to 3.5 |
