CAS number: 73-22-3
Molecular formula: C11H12N2O2
molecular weight: 204.2252
Chemical structure:
Product Name | L-tryptophan | |
Shelf Life | 2 years | |
Item | Specifications | Results |
Appearance | White crystals or crystalline powder | Conforms |
Specific rotation | -29.4°~ -32.8° | -31.6° |
PH | 5.5-7.0 | 5.9 |
Loss on drying | ≤0.3 | 0.07 |
Residue on ignition | ≤0.10 | 0.06 |
Chloride (Cl) | ≤0.05 | <0.05 |
Sulfate(SO4) | ≤0.03 | <0.03 |
Irom(Fe) | ≤0.003 | <0.003 |
Heavy metals (Pb) | ≤0.0015 | <0.0015 |
Organic volatile impurities | Meets the requirements | Meets the requirements |
Assay | 98.5~101.5 | |
Conclusion: This product conforms to requirements of USP24grade standard. |