Specification
Appearance | White crystals or crystalline powder | conforms |
Specific rotation[a]D20 | + 8.3°~ +9.5° | +8.72° |
State of solution (Transmittance) | ≥95.0% | 98.5% |
Loss on drying | ≤0.50% | 0.18% |
Residue on ignition | ≤0.10% | 0.07% |
Heavy metals(Pb) | ≤10PPM | <10PPM |
Chloride (Cl) | 600---1000ppm | 800ppm |
Arsenic (As2O3) | ≤1PPM | conforms |
Iron (Fe) | ≤10PPM | <10PPM |
Ammonium (NH4) | ≤0.02% | <0.02% |
Sulfate (SO4) | ≤0.030% | ≤0.030% |
Other amino acids | Chromatographically | Qualified |
PH value | 4.5 ~ 5.5 | 5.0 |
Assay | 98.0%~101.0% | 99.4% |