CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | L-tryptophan is a white powder with a flat taste. An essential amino acid; occurs in isomeric forms. (NTP, 1992) |
|---|---|
| Color/Form | Leaflets or plates from dilute alcohol |
| Odor | Odorless |
| Taste | FLAT TASTE |
| Melting Point | 554 to 558 °F (Decomposes) (NTP, 1992) |
| Solubility | 1 to 5 mg/mL at 68 °F (NTP, 1992) |
| LogP | -1.06 |
| LogS | -1.23 |
| Optical Rotation | Specific optical rotation: -31.5 deg at 23 °C/D (water, 1%), +2.4 deg at 20 °C/D (hydrochloric acid, 0.5 N); +0.15 deg at 20 °C/D (sodium hydroxide, 2.43% in 0.5 N) |
| Decomposition | When heated to decomposition it emits toxic fumes of /nitric oxide/. |
| pH | A 1% solution in water has a pH of 5.5 to 7. |
| Ionization Efficiency | Negative |
| Dissociation Constants | 2.36 |
| Collision Cross Section | 154.22 Ų [M+H]+ [CCS Type: DT, Method: stepped-field] |
| Other Experimental Properties | Decomposes at 289 °C (rapid heating) |
| Chemical Classes | Biological Agents -> Amino Acids and Derivatives |
COMPUTED DESCRIPTORS
| Molecular Weight | 204.22 g/mol |
|---|---|
| XLogP3 | -1.1 |
| Hydrogen Bond Donor Count | 3 |
| Hydrogen Bond Acceptor Count | 3 |
| Rotatable Bond Count | 3 |
| Exact Mass | 204.089877630 g/mol |
| Monoisotopic Mass | 204.089877630 g/mol |
| Topological Polar Surface Area | 79.1 Ų |
| Heavy Atom Count | 15 |
| Formal Charge | 0 |
| Complexity | 245 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 1 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
L-tryptophan is a white powder with a flat taste. An essential amino acid; occurs in isomeric forms. (NTP, 1992)