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Product Specifications
| Product Name:DL-Tryptophan | Factory Standard |
| Assay | 99.0～101.0% |
| PH | 5.5～6.4 |
| Specific rotation[a]D20 | / |
| Specific rotation[a]D25 | / |
| Transmittance(T430) | ≥95.0% |
| Chloride(Cl) | ≤0.02% |
| Ammonium(NH4) | ≤0.02% |
| Sulfate(SO4) | ≤0.02% |
| Iron(Fe) | ≤10ppm |
| Heavy metals(Pb) | ≤10ppm |
| Arsenic | ≤1ppm |
| Related substances | / |
| Other amino acids | / |
| Ninhydrin-positive substances | / |
| Loss on drying | ≤0.20% |
| Residue on ignition | ≤0.10% |
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