L

L-Lysine

IUPAC: (2S)-2,6-diaminohexanoic acid

C6H14N2O2 Organic Compounds CAS 56-87-1
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Quick Reference
Formula / NotationC6H14N2O2
CAS Number56-87-1
Molecular Weight146.19
Melting Point224.5 dec °C
Solubility1000000 mg/L (at 20 °C)
AppearanceLiquid
Also Known As(2S)-2,6-diaminohexanoic acid; lysine; 56-87-1; lysine acid; h-Lys-oh; (S)-Lysine; Aminutrin; alpha-Lysine; (S)-2,6-Diaminohexanoic acid; L-lys
CategoryOrganic Compounds

What is L-Lysine?

L-lysine is an L-alpha-amino acid; the L-isomer of lysine. It has a role as a micronutrient, an anticonvulsant, a nutraceutical, a mouse metabolite, a Saccharomyces cerevisiae metabolite, a plant metabolite, an Escherichia coli metabolite, a human metabolite and an algal metabolite. It is a L-alpha-amino acid, an aspartate family amino acid, a lysine and a proteinogenic amino acid. It is a conjugate base of a L-lysinium(1+). It is a conjugate acid of a L-lysinate. It is an enantiomer of a D-lysine. It is a tautomer of a L-lysine zwitterion and a L-Lysine zwitterion.

Formula & Notation

C6H14N2O2

IUPAC Name: (2S)-2,6-diaminohexanoic acid

Other Names / Synonyms: (2S)-2,6-diaminohexanoic acid; lysine; 56-87-1; lysine acid; h-Lys-oh; (S)-Lysine; Aminutrin; alpha-Lysine; (S)-2,6-Diaminohexanoic acid; L-lys

Properties & Characteristics

Appearance: Liquid. Molecular formula: C6H14N2O2. Molecular weight: 146.19 g/mol. Melting point: 224.5 dec °C. Solubility: 1000000 mg/L (at 20 °C). Vapor pressure: 5.28X10+9 mm Hg at 25 °C /extrapolated/. LogP: -3.

Physical Data

PropertyValue
Melting Point224.5 dec °C
Molecular Weight146.19
Solubility1000000 mg/L (at 20 °C)
AppearanceLiquid

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-Lysine
Formula C6H14N2O2
CAS Number 56-87-1
Molecular Weight 146.19
Synonyms (2S)-2,6-diaminohexanoic acid; lysine; 56-87-1; lysine acid; h-Lys-oh; (S)-Lysine; Aminutrin; alpha-Lysine; (S)-2,6-Diaminohexanoic acid; L-lys

Frequently Asked Questions

L-lysine is an L-alpha-amino acid; the L-isomer of lysine. It has a role as a micronutrient, an anticonvulsant, a nutraceutical, a mouse metabolite, a Saccharomyces cerevisiae metabolite, a plant metabolite, an Escherichia coli metabolite, a human metabolite and an algal metabolite. It is a L-alpha-amino acid, an aspartate family amino acid, a lysine and a proteinogenic amino acid. It is a conjugate base of a L-lysinium(1+). It is a conjugate acid of a L-lysinate. It is an enantiomer of a D-lysine. It is a tautomer of a L-lysine zwitterion and a L-Lysine 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.