Items | Standard |
Appearance | White crystal or white crystalline powder |
Specific Rotation [20/D] (C=2 in H2O) | +46.5° to +49.0° |
Transmittance | Not less than 96.0% |
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 30ppm |
Heavy metal(Pb) | Not more than 10ppm |
Arsenic(As2O3) | Not more than 2ppm |
Other amino acids | Chromatographically Not detectable |
Loss on drying | Not more than 0.5% |
Residue on ignition(sulfated) | Not more than 0.1% |
Assay | 98% to102% |
pH | 2.0 to 3.0 |