White crystal or crystalline powder, slightly odorous, slightly bitter, slightly soluble in water.
Tryptophan is an important neurotransmitter in the human body and one of the essential amino acids in the human body. It is widely used in nutritional supplements for pregnant women and special milk powder for young children. It can also be used as a tranquilizer to regulate mental rhythm and improve sleep.
Tryptophan can improve lactation of dairy animals, reduce the amount of high-quality dietary protein, save feed costs, reduce the amount of dietary protein feed, and save formula space.
| Items | Index |
| Assay | 98%Min |
| Loss on drying | 0.5% Max |
| Heavy metals | 20mg/kg Max |
| Arsenic（As） | 2mg/kg Max |
| Residue on ignition | 0.5%Max |
| Specific Rotation | -29.0- -32.3 |
