Home/Chemicals/56-87-1

Chemical substance record

L-lysine

56-87-1C₆H₁₄N₂O₂146.19 g/mol

Organic/Inorganic Small MoleculeChEBI source record

An L-α-amino acid; the L-isomer of lysine. — ChEBI

Safety references

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Identity & molecular properties

Source-linked values

CAS number	56-87-1	ChEBI ↗
Molecular formula	C₆H₁₄N₂O₂	ChEBI ↗
Molar mass	146.19 g/mol	ChEBI ↗
Monoisotopic mass	146.10553 Da	ChEBI ↗
Formal charge	0	ChEBI ↗
ChEBI identifier	CHEBI:18019	ChEBI ↗

Cross-source molecular data

PubChem

Molar mass	146.19 g/mol	PubChem ↗
Exact mass	146.105527694 Da	PubChem ↗
Computed XLogP	-3	PubChem ↗
Topological polar surface area (Å²)	89.3	PubChem ↗
H-bond donors	3	PubChem ↗
H-bond acceptors	4	PubChem ↗
Rotatable bonds	5	PubChem ↗

PubChem computed values are shown separately from the ChEBI record. An exact InChIKey match was used to connect the records. Molecular descriptors do not describe a supplied product’s purity, particle size or performance.

Names & structural identifiers

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Source preferred name

L-lysine

IUPAC name

(2S)-2,6-diaminohexanoic acid

InChIKey

KDXKERNSBIXSRK-YFKPBYRVSA-N

SMILES

NCCCC[C@H](N)C(=O)O

InChI

InChI=1S/C6H14N2O2/c7-4-2-1-3-5(8)6(9)10/h5H,1-4,7-8H2,(H,9,10)/t5-/m0/s1

Names & synonyms

(2S)-2,6-diaminohexanoic acidlysinalysinelysinum

Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.

Classification & relationships

ChEBI ontology

L-alpha-amino acidChEBI parent class · 15705 ↗aspartate family amino acidChEBI parent class · 22658 ↗lysineChEBI parent class · 25094 ↗proteinogenic amino acidChEBI parent class · 83813 ↗

carboxylic acid amino acid organic molecular entity

Roles recorded in ChEBI

micronutrientanticonvulsantnutraceuticalmouse metaboliteSaccharomyces cerevisiae metaboliteplant metaboliteEscherichia coli metabolitehuman metabolitealgal metabolite

Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.

Mass ↔ amount of substance

Calculated from sourced mass

Amount

Input unit

Equivalent amount

0.00684041 mol

Uses 146.19 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Elemental composition

Theoretical mass fractions

C

Carbon · 6 atoms

49.30%

O

Oxygen · 2 atoms

21.89%

N

Nitrogen · 2 atoms

19.16%

H

Hydrogen · 14 atoms

9.65%

Calculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.

Research & patent references

Selected source associations

Reaction with, and fine structural recognition of polyamines by human IgE antibodies. ↗Molecular immunology · 2000 Apr · PMID 10930630

Generation of an antibody specific to erythritol, a non-immunogenic food additive. ↗Food additives and contaminants · 2006 Sep · PMID 16901854

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Sources & record history

Checked 27 Sep 2026

Identity, formula, mass, synonyms & ontologyEMBL-EBI ChEBI · CHEBI:18019

Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0

Additional molecular descriptorsNCBI PubChem · CID 5962 · retrieved 2026-09-27

PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.

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