Item | Standard | Analysis data |
Appearance | White crystals or crystalline powder | conforms |
Specific rotation[α]20/D (C=2,H2O) | +14.0°to+17.0° | +15.5° |
Transmittance | Not less than 95.0% | 98.0% |
Heavy metal(Pb) | Not more than 20ppm | <10ppm |
Arsenic(As2O3) | Not more than 2ppm | <2ppm |
Other amino acids | Chromatographically not detectable | conforms |
Loss on drying | Not more than 0.50% | 0.3% |
Residue on ignition | Not more than 0.30% | 0.2% |
Assay | 98.0to102.0% | 99.3% |
pH | 1.7to2.8 | 2.3 |