Appearance White crystals or crystalline powder
Assay 98.0~101.0%
pH 4.5~5.5
Specific rotation [α]D25 +8.3°~ +9.5°
State of solution (Transmittance T430) ≥95.0%
Chloride (Cl) ≤0.04%
Ammonium (NH4) ≤0.02%
Sulfate (SO4) ≤0.03%
Iron (Fe) ≤10ppm
Heay metals (Pb) ≤10ppm
Arsenic (As) ≤1ppm
Other amino acids Chromatographically not detectable
Loss on drying ≤0.50%
Residue on ignition ≤0.10%
