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Appearance White crystalline powder Specific rotation[α]20/D (C=8 6N HCl) +28.0 to ~30.0Degree Transmittance Not less than 98.0% Chloride (Cl) Not more than 0.020% Ammonium (NH4) Not more than 0.02% Sulfate (SO4) Not more than 0.030% Iron (Fe) Not more than 10ppm Heavy metal(Pb) Not more than 10ppm Arsenic(As2O3) Not more than 1ppm Other Amino Acids Chromatographically Not detectable Water Not more than 5.0% Residue on ignition(sulfated) Not more than 0.20% Assay 98.5%~101.0% PH 6.0 to 7.5