Appearance White crystals or crystalline powder
Assay 98.5%~101.5%
Speciific rotation -27.6°~-29.0°
PH 5.0-6.5
Chloride 0.02% max
Ammonium 200ppm max
Sulfate 0.02% max
Hevy metals 10PPM max
Arsenic 1 PPM max
Iron 10PPM max
Other amino acids 0.5% max
Residue on ignition 0.1% max
Loss on drying 0.2% max
