L-Tryptophan：
| General Information |
| Products name:L-Tryptophan |
| CAS NO :73-55-6 |
| EINECS NO:200-795-6 |
| Molecular formula: C11H12N2O2 |
| Molecular weight: 204.23 |
| Appearance:white-like crystalline powder |
| Solubility:water soluble 11.4 g/L (25 ℃) |
| USES: to improve nutrition, enhanced physique, nutritional supplements, antioxidant |
| Standard: USP24 USP28 |
| BASIC ANALYSIS | |||
| Item of Analysis | Specification | Results | Test Methods |
| Assay | 98.5~101.5% | 99.2% | HPLC |
| Organoleptic | |||
| Appearance | Powder | Conforms | Organoleptic |
| Color | white-like crystalline powder | Conforms | Organoleptic |
| Odor | Characteristic | Conforms | CP2010 |
| Taste | Characteristic | Conforms | CP2010 |
| Physical Characteristics | |||
| Particle Size | 100% pass 80 mesh | 80MESH | CP2010 |
| Loss on drying | 0.1%NMT (%) | 0.02% | USP<731> |
| Total ash | 0.3%NMT (%) | 0.11% | USP<561> |
| Specific rotation | -29.4°~-32.8° | -31.3° | CP2010IA |
| Chloride | ≤0.05% | ≤0.05% | NLS-QCS-1007 |
| Sulfate(SO4） | ≤0.03% | ＜0.03% | USP32 |
| Iron | ≤0.003 | ＜0.003% | USP32 |
| Heavy metals | |||
| Total Heavy Metals | ≤0.0015% | ＜0.0015% | USP<231>method II |
| Microbiological Tests | |||
| Total Plate Count | 1000cfu/g Max | Conform | USP<61> |
| Yeast & Mold | 100cfu/g Max | Conform | USP<61> |
| E. Coli. | Negative | Conform | USP<61> |
| Salmonella | Negative | Conform | USP<61> |
| Staphylococcus | Negative | Conform | USP<61> |
