5-Methyl-DL-tryptophan
- CAS NO.：951-55-3
- Empirical Formula: C12H14N2O2
- Molecular Weight: 218.25
- MDL number: MFCD00005652
- EINECS: 213-453-6
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-09-12 18:53:31
What is 5-Methyl-DL-tryptophan?
Chemical properties
off-white powder
What are the applications of Application
5-Methyl-DL-tryptophan is a corepressor of the E. coli trp repressor
Definition
ChEBI: 5-methyltryptophan is a tryptophan derivative that is tryptophan substituted by a methyl group at position 5 of the indole ring. It is a non-proteinogenic alpha-amino acid and a tryptophan derivative.
Purification Methods
Crystallise dl-5-methyltryptophan from aqueous EtOH after dissolving it in aqueous NaOH, precipitating with AcOH, filtering the solid off and drying for 24hours at 50o. [Jackman & Archer J Am Chem Soc 68 2105 1946, Beilstein 22 IV 6815.] The picrate crystallises from MeOH with m 202o(dec). The N-phenylcarbamoyl derivative crystallises from aqueous MeOH with m 202o. [Gordon & Jackson J Biol Chem 110 151, 154 1935.]
Properties of 5-Methyl-DL-tryptophan
| Melting point: | ~275 °C (dec.) |
| Boiling point: | 358.94°C (rough estimate) |
| alpha | [α]D20 -1～+1゜ (c=1, dil. HCl) |
| Density | 1.1402 (rough estimate) |
| refractive index | 1.6660 (estimate) |
| storage temp. | Sealed in dry,Room Temperature |
| pka | 2.26±0.10(Predicted) |
| form | Powder |
| color | Off-white |
| BRN | 20225 |
| CAS DataBase Reference | 951-55-3(CAS DataBase Reference) |
Safety information for 5-Methyl-DL-tryptophan
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H317:Sensitisation, Skin |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. |
Computed Descriptors for 5-Methyl-DL-tryptophan
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