Item | Standard | Analysis data |
Appearance | White crystals or crystalline powder | conforms |
Specific rotation[α]20/D (C=2,H2O) | -14.0°to-17.0° | -15.25° |
Transmittance | Not less than 95.0% | 98.1% |
Heavy metal(Pb) | Not more than 20ppm | <10ppm |
Iron (Fe) | Not more than 10ppm | 8ppm |
Arsenic(As2O3) | Not more than 2ppm | <2ppm |
Chloride (Cl) | Not more than 0.020% | 0.02% |
Sulfate (SO4) | Not more than 0.10% | 0.005% |
Other amino acids | Chromatographically not detectable | conforms |
Loss on drying | Not more than 0.50% | 0.10% |
Residue on ignition | Not more than 0.30% | 0.098% |
Assay | 98.0to102.0% | 99.5% |
pH | 1.7to2.8 | 2.2 |
Conclusion | The product is according with standard. |