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Solubility in water
Colorless & clear (c=3)
Specific rotation [α]D20
-11.8°~-12.8°(c= 11, 6M-HCl)
Loss on drying
Not more than 0.3%
Residue on ignition (as sulfate)
Not more than 0.1%
Chloride (Cl)
Not more than 0.02%
Sulfate (SO4)
Not more than 0.03%
Heavy metals (as Pb)
Not more than 10ppm
Iron (Fe)
Not more than 10ppm
Ammonium (NH4)
Not more than 0.02%
Arsenic (As2O3)
Not more than 1ppm
Other amino acids
Not detected by T.L.C.(The spotted amount, 20μg)
Assay
98.5%~101.0%
L-Isomer
Not more than 0.5%