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Items L-Tryptophan | Standards |
Appearance | White crystals or crystalline powder |
Assay | 99%-100.5% |
State of solution | 95.0% Min |
Specific Rotation | -30.5~-32.5 |
Loss on Drying | 0.2% Max |
Ph | 5.4-6.4 |
Chloride | 0.02% Max |
Ammonium(NH4) | 0.02% Max |
Iron | 0.02% Max |
Sulfate | 0.02% Max |
Residue on ignition | 0.1% Max |
Heavy Metals | 0.001% Max |
Arsenic(As2O3) | 0.0001% Max |
Other Amino Acids | 0.5% Max |










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