Specifications:
Item Standard Analysis data
Appearance White crystals or crystalline powder Conforms
Specific rotation[α]20/D
(C=4 in 6N HCl) +14.9 to +16.0° 14.90°
State of solution
(Transmittance) Clear and colorless
Not less than 98.0% Clear
98.0%
Chloride (Cl) Not more than 0.020% 0.02%
Ammonium (NH4) Not more than 0.02% 0.01%
Sulfate (SO4) Not more than 0.020% 0.008%
Iron (Fe) Not more than 10ppm 9ppm
Heavy metal(Pb) Not more than 10ppm 6ppm
Arsenic(As2O3) Not more than 1ppm conforms
Other amino acids Chromatographically
Not detectable Conforms
Loss on drying Not more than 0.20% 0.19%
Residue on ignition(sulfated) Not more than 0.10% 0.045%
Assay 98.5 to101.0% 98.9%
pH 5.5 to 6.5 6.06