L-Methionine
L-Methionine is an organic compound with the molecular formula C5H11NO2S.
- Formula
- C5H11NO2S
- Functional group
- Amino acids
- Molar mass
- 149.21 g/mol
- Also known as
- (2S)-2-amino-4-methylsulfanylbutanoic acid, methionine, h-Met-oh, (S)-2-Amino-4-(methylthio)butanoic acid, Cymethion, L-(-)-Methionine, S-Methionine
Overview
L-Methionine is an organic compound with the molecular formula C5H11NO2S.
Identifiers
- Formula
- C5H11NO2S
- Functional group
- Amino acids
- Molar mass
- 149.21 g/mol
- Also known as
- (2S)-2-amino-4-methylsulfanylbutanoic acid, methionine, h-Met-oh, (S)-2-Amino-4-(methylthio)butanoic acid, Cymethion, L-(-)-Methionine, S-Methionine
Chemical identifiers
- SMILES
- CSCC[C@@H](C(=O)O)N
- InChI
- InChI=1S/C5H11NO2S/c1-9-3-2-4(6)5(7)8/h4H,2-3,6H2,1H3,(H,7,8)/t4-/m0/s1
- PubChem CID
- 6137
Properties
- Melting / decomposition
- 280-282 °C (decomposes, sealed capillary)
- Boiling / decomposition
- 181 °C (decomposes)
- Water solubility
- In water, 56.6 g/L at 25 °C
Data availability
Not published: Density.
Related compounds
- Amino acids
L-Methionine is an organic compound with the molecular formula C5H11NO2S.
References
- PubChem Compound Summary: L-Methionine (CID 6137)National Center for Biotechnology Information · PubChem
Identity, molecular formula, molecular weight and aliases retrieved via PUG REST on 2026-09-08.
- Hazardous Substances Data Bank (HSDB): L-Methionine — melting pointHazardous Substances Data Bank (HSDB)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6137#section=Melting-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 2006., p. 1032
- Hazardous Substances Data Bank (HSDB): L-Methionine — boiling pointHazardous Substances Data Bank (HSDB)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6137#section=Boiling-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Lide, D.R. CRC Handbook of Chemistry and Physics 88TH Edition 2007-2008. CRC Press, Taylor & Francis, Boca Raton, FL 2007, p. 3-328
- Hazardous Substances Data Bank (HSDB): L-Methionine — solubilityHazardous Substances Data Bank (HSDB)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6137#section=Solubility. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Yalkowsky, S.H., He, Yan., Handbook of Aqueous Solubility Data: An Extensive Compilation of Aqueous Solubility Data for Organic Compounds Extracted from the AQUASOL dATAbASE. CRC Press LLC, Boca Raton, FL. 2003., p. 175