L-Tyrosine | |
Item |
Specification |
Appearance |
White crystals or crystalline powder |
Specific Rotation[α]D20 |
-11.3° to -12.1° |
State of solution |
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 10ppm |
Heavy Metals (Pb) |
Not more than 10ppm |
Aresenic (As2O3) |
Not more than 1ppm |
Other amino aicds |
Chromatographically not detectable |
Loss on drying |
Not more than 0.20% |
Residue on ignition |
Not more than 0.10% |
Assay |
99.0% to 100.5% |
pH |
5.0 to 6.5 |
