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L-Tryptophan
An essential amino acid in human. Not only for protein building, but also important substance as a precursor of niacin, serotonin, melatonin, etc. It is widely used as an ingredient in infusion.
| Cas.No | 73-22-3 |
| Assay | 99.0-101.0% |
| Specification | White to yellowish white crystals or crystalline powder, odorless, slightly bitter taste |
| Applications | Infusion |
| Packaging | 25kg&50kg |
| Pharmacopeia | JP,USP,EP,FCC |
| STORAGE | Controlled room temperature in tight container |
SPECIFICATION AND PROCEDURE
| State of solution (Transmittance) |
Not Less Than 95.0% |
| pH | 5.5～6.4 |
| Specific rotation[α]20D | -30.5～-32.5° |
| Specific rotation[α]25D | -29.4～-32.8° |
| Ammonium (NH4) | Not More Than 0.020% |
| Chloride (Cl) | Not More Than 0.020% |
| Sulfate (SO4) | Not More Than 0.020% |
| Iron (Fe) | Not More Than 10 ppm |
| Heavy metals (Pb)** | Not More Than 10 ppm |
| Arsenic (As2O3) | Not More Than 1 ppm |
| Related substances | Not More Than 0.5% |
| Loss on drying | Not More Than 0.20% |
| Residue on ignition | Not More Than 0.10% |
| Endotoxin* | Less Than 6.0 EU/g |
| Assay (dry basis) | 99.0～101.0% |
· * The endotoxin-certified grade will be supplied on request.
· ** FCC grade (Lead : Not More Than 5 mg/kg) will be supplied on request.
· This product meets requirements of residual solvents listed in the current JP, USP and EP.
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