L

L-Alanine

IUPAC: (2S)-2-aminopropanoic acid

C3H7NO2 Organic Compounds CAS 56-41-7
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Quick Reference
Formula / NotationC3H7NO2
CAS Number56-41-7
Molecular Weight89.09
Melting Point300 dec °C
Boiling Point250 °C (sublimes)
Density1.432 g/cu cm at 22 °C
Solubility164000 mg/L (at 25 °C)
AppearanceOther Solid
Also Known As(2S)-2-aminopropanoic acid; 56-41-7; alanine; (S)-Alanine; (2S)-2-Aminopropanoic acid; L-alpha-alanine; (S)-2-Aminopropanoic acid; L-2-Aminopropionic acid; 2-Aminopropionic acid; L-(+)-Alanine
CategoryOrganic Compounds

What is L-Alanine?

L-alanine is the L-enantiomer of alanine. It has a role as an EC 4.3.1.15 (diaminopropionate ammonia-lyase) inhibitor and a fundamental metabolite. It is a L-alpha-amino acid, an alanine, a pyruvate family amino acid and a proteinogenic amino acid. It is a conjugate base of a L-alaninium. It is a conjugate acid of a L-alaninate. It is an enantiomer of a D-alanine. It is a tautomer of a L-alanine zwitterion.

Formula & Notation

C3H7NO2

IUPAC Name: (2S)-2-aminopropanoic acid

Other Names / Synonyms: (2S)-2-aminopropanoic acid; 56-41-7; alanine; (S)-Alanine; (2S)-2-Aminopropanoic acid; L-alpha-alanine; (S)-2-Aminopropanoic acid; L-2-Aminopropionic acid; 2-Aminopropionic acid; L-(+)-Alanine

Properties & Characteristics

Appearance: Other Solid. Molecular formula: C3H7NO2. Molecular weight: 89.09 g/mol. Boiling point: 250 °C (sublimes). Melting point: 300 dec °C. Density: 1.432 g/cu cm at 22 °C. Solubility: 164000 mg/L (at 25 °C). Vapor pressure: 0.00000011 [mmHg]. LogP: -3.

Physical Data

PropertyValue
Melting Point300 dec °C
Boiling Point250 °C (sublimes)
Density1.432 g/cu cm at 22 °C
Molecular Weight89.09
Solubility164000 mg/L (at 25 °C)
AppearanceOther Solid

Uses & Applications

Used as an industrial feedstock, solvent, pharmaceutical intermediate, flavoring agent, or chemical building block.

Safety Information

Flammable or irritant. Many organic compounds are flammable liquids or vapours. Keep away from ignition sources. Consult SDS for specific hazard data.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term L-Alanine
Formula C3H7NO2
CAS Number 56-41-7
Molecular Weight 89.09
Synonyms (2S)-2-aminopropanoic acid; 56-41-7; alanine; (S)-Alanine; (2S)-2-Aminopropanoic acid; L-alpha-alanine; (S)-2-Aminopropanoic acid; L-2-Aminopropionic acid; 2-Aminopropionic acid; L-(+)-Alanine

Frequently Asked Questions

L-alanine is the L-enantiomer of alanine. It has a role as an EC 4.3.1.15 (diaminopropionate ammonia-lyase) inhibitor and a fundamental metabolite. It is a L-alpha-amino acid, an alanine, a pyruvate family amino acid and a proteinogenic amino acid. It is a conjugate base of a L-alaninium. It is a conjugate acid of a L-alaninate. It is an enantiomer of a D-alanine. It is a tautomer of a L-alanine zwitterion.

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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.