Appearance
White crystals or crystalline powder

Specific rotation[α]20/D

(C=5,1mol/L HCL)
-11.3 to -12.1°

State of solution

(Transmittance)
Clear and colorless

Not less than 95.0%

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 20ppm

Heavy metal(Pb)
Not more than 10ppm

Arsenic(As2O3)
Not more than 1ppm

Other amino acids
Chromatographically

Not detectable

Loss on drying
Not more than 0.20%

Residue on ignition(sulfated)
Not more than 0.10%

Assay
98.5 to100.5%

pH
5.0 to 6.5