L-Tryptophan
CAS Number: 73-22-3
Chemical Formula: C11H12N2O2
Synonyms: Tryptophan (W) Solution, 100ppm， L-Tryptophan, Animal-Free，L-TRYPTOPHAN (13C11,D8,15N2)
Appearance: White powder
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
L-Tryptophan 73-22-3 is the L-isomer of tryptophan. It acts as an antidepressant, a nutritional supplement, a necessary micronutrient, and a key metabolite in plants, humans, Saccharomyces cerevisiae, Escherichia coli, and mice.
Chemical Properties
| Item | Value |
| Melting point | 289-290 °C (dec.)(lit.) |
| alpha | -31.1 º (c=1, H2O) |
| Boiling point | 342.72°C (rough estimate) |
| density | 1.34 |
| bulk density | 400kg/m3 |
| refractive index | -32 ° (C=1, H2O) |
| storage temp. | 2-8°C |
| solubility | 20% NH3: 0.1 g/mL at 20 °C, clear, colorless |
| form | powder |
| pka | 2.46(at 25℃) |
| color | White to yellow-white |
| PH | 5.5-7.0 (10g/l, H2O, 20℃) |
| Odor | wh. cryst. or cryst. odorless powd., sl. bitter taste |
| biological source | non-animal source |
| Optical Rotation | [α]20/D 31.5±1°, c = 1% in H2O |
| Water Solubility | 11.4 g/L (25 ºC) |
Safety Information
| Item | Value |
| Merck | 14,9797 |
| BRN | 86197 |
| Stability | Stable. Incompatible with strong acids, strong oxidizing agents. |
| InChIKey | QIVBCDIJIAJPQS-VIFPVBQESA-N |
| LogP | 0.704 (est) |
| CAS DataBase Reference | 73-22-3(CAS DataBase Reference) |
| NIST Chemistry Reference | L-Tryptophan(73-22-3) |
| EPA Substance Registry System | L-Tryptophan (73-22-3) |
| Absorption | cut-off at 326nm in 0.5 M HCl at 0.5M |
Product Application
It can be used in amino acid infusions, often combined with iron and vitamins. Taking it with vitamin B6 may help relieve depression and maintain skin health. As a sleep aid, it can be used with L-dopa for Parkinson’s disease. It shows carcinogenicity in animal tests; possible side effects include nausea, anorexia, and asthma. Do not use with monoamine oxidase inhibitors.
Supply & Delivery
Fast delivery time
Inventory: 2-3 working days
New production: 7-10 working days
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