L-Tryptophan
L-Tryptophan for pharmaceutical raw materials & food additives. GMP certificated manufacturer. Good price with high quality.
Distinguish | The infrared absorption atlas should be consistent with the comparison atlas. |
Specific rotation [ a ] D20 | -30.0°~ -32.5° |
Transmittance | ≥95.0% |
Chloride ( Cl ) | ≤0.02% |
Ammonium ( NH4 ) | ≤0.02% |
Iron ( Fe ) | ≤0.002% |
Sulfate ( SO4 ) | ≤0.02% |
Heavy metals ( Pb ) | ≤0.001% |
Arsenic ( As2O3 ) | ≤0.0001% |
Other amino acids | ≤0.5% |
Loss on drying | ≤0.2% |
Residue on ignition | ≤0.1% |
Assay | ≥98.5% |
Endotoxin | 50EU/g |
PH | 5.4 ~ 6.4 |
L-Tryptophan
