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
L-Tyrosine