 |
L-Tyrosine
| Chemical Name： |
3-(4-Hydroxyphenyl)-L-alanine |
| Structure Formula： |
 |
| Molecular Formula： |
C9H11NO3 |
| Molecular Weight： |
181.19 |
| Cas No： |
[60-18-4] |
| Characteristics： |
White, styli form crystals with bitterness, soluble in dilute acids or base |
| Quality Standards： |
FCCIV, USP24 and BP93 etc. |
| |
| |
AJI92 |
USP24 |
FCC4 |
| Appearance |
White crystals or crystalline powder |
White crystals or crystalline powder |
- - - |
| Assay |
99.0~101.0% |
98.5~101.5% |
98.5～101.5% |
| PH |
5.0~6.5 |
5.0～6.5 |
- - - |
| Specific rotation[a]D20° |
-11.3°～-12.1° |
-9.8°～-11.2° |
-9.8°～-11.2° |
| State of solution |
≥98.0% |
| Chloride(Cl) |
≤0.020% |
≤0.04% |
≤0.020% |
| Ammonium(NH4) |
≤0.02% |
- - - |
- - - |
| Sulfate(SO4 ) |
≤0.020% |
≤0.03% |
≤0.020% |
| Iron(Fe) |
≤10PPm |
≤10PPm |
- - - |
| Heavy metals(Pb) |
≤10PPm |
≤15PPm |
≤10mg/kg |
| Arsenic(As2O3) |
≤1PPm |
| Other amino acids |
Not detectable by TCL |
| Loss on drying |
≤0.2% |
≤0.3% |
≤0.30% |
| Residue on ignition |
≤0.1% |
≤0.4% |
≤0.10% |
|
