L-Tryptophan
CAS Number: 73-22-3
Appearance: White to yellow-white powder
Molecular Formula: C11H12N2O2
Molecular weight: 204.23
Sample: Available
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Industrial L-Tryptophan has a purity of at least 99%, appearing as a white to pale yellow crystalline powder with a faint odor. It decomposes at a melting point of 289℃ and has no distinct boiling point. Its vapor pressure is negligible at 25℃, and the relative density is 1.36 at 20℃. It is slightly soluble in water, soluble in dilute acids and alkalis, and insoluble in ethanol and ether. The product is stable under normal conditions but incompatible with strong oxidizing agents.
Parameters
| Item | Value |
| Melting point | 289-290 °C (dec.)(lit.) |
| alpha | -31.1 º (c=1, H20) |
| 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) |
| Merck | 14,9797 |
| BRN | 86197 |
| Stability: | Stable. Incompatible with strong acids, strong oxidizing agents. |
| Cosmetics Ingredients Functions | HAIR CONDITIONING ANTISTATIC FRAGRANCE |
| 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 |
Safety Information
| Item | Value |
| Hazard Codes | Xi |
| Risk Statements | 33-40-62-41-37/38-36/37/38-22 |
| Safety Statements | 24/25-36/37/39-36-26 |
| WGK Germany | 2 |
| RTECS | YN6130000 |
| F | 8 |
| TSCA | Yes |
| HS Code | 29339990 |
| Hazardous Substances Data | 73-22-3(Hazardous Substances Data) |
| Toxicity | LD508mmol / kg (rat, intraperitoneal injection). It is safe when used in food (FDA, §172.320, 2000). |
Product Application of L-TryptophanCAS73-22-3
L-Tryptophan is an essential amino acid critical for normal growth in infants and the maintenance of nitrogen balance in adults. As a natural dietary supplement, it supports mood balance and healthy sleep. It serves as a biological precursor to niacin, indole alkaloids, and serotonin. It is also widely used as an intrinsic fluorescent probe to characterize the microenvironment of proteins and biomolecules.
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