L-Methionine
Also known as: (S)-2-Amino-4-(methylthio)butanoic acid, H-Met-OH, Met, (S)-2-Amino-4-(methylthio)butyric acid, 2-Amino-4-(methylthio)butyric acid, (S)-, L-α-Amino-γ-methylmercaptobutyric acid, S-Methyl-L-homocysteine, L-Methionin, Methionine, MFCD00063097, EINECS 200-562-9
L-Methionine (CAS 63-68-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H11NO2S and a molecular weight of 149.211 g/mol. Key properties include a melting point of 284 °C (dec.)(lit.), a boiling point of 306.9±37.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 139.4±26.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 63-68-3
- Jingsj CID
- J-37952-6
- Molecular Formula
- C5H11NO2S
- Molecular Weight
- 149.211 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 284 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 306.9±37.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 139.4±26.5 °C |
| Exact Mass | 149.051056 |
| PSA | 88.62000 |
| LogP | 0.37 |
| Vapor Pressure | 0.0±1.4 mmHg at 25°C |
| Refractive Index | 1.531 |
| Additional Property | Soluble |
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|
Customs & Trade Information
| HS Code | 2930400000 |
|---|
Frequently Asked Questions
What is the CAS number of L-Methionine?
The CAS number of L-Methionine is 63-68-3.
What are the molecular formula and molecular weight of L-Methionine?
L-Methionine has molecular formula C5H11NO2S and molecular weight 149.211 g/mol.
What are the upstream and downstream products of L-Methionine?
For L-Methionine, Upstream Products: L-Methionine, methylester(H-Met-OMe), DL-Methionine, Fmoc-L-methionine; Downstream Products: N-Formyl-L-methionine, D-Methionine, 3-(Methylthio)propylamine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "L-Methionine (CAS 63-68-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-37952-6 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.