Appearance White crystalline powder Specific rotation[α]20/D (C=8 6N HCL ) +16.0 to ~18.5 Degree Transmittance Not less than 95% 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 10ppm Heavy metal(Pb) Not more than 10ppm Other Amino Acids Chromatographically Not detectable Loss on drying Not more than 2.0% Residue on ignition(sulfated) Not more than 0.10% Assay 98.5%~101.5%