Home/Chemicals/305-84-0

Chemical substance record

Carnosine

305-84-0C₉H₁₄N₄O₃226.236 g/mol

Protein/Peptide SequenceChEBI source record

A dipeptide that is the N-(β-alanyl) derivative of L-histidine. — ChEBI

Safety references

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Identity & molecular properties

Source-linked values

CAS number	305-84-0	ChEBI ↗
Molecular formula	C₉H₁₄N₄O₃	ChEBI ↗
Molar mass	226.236 g/mol	ChEBI ↗
Monoisotopic mass	226.10659 Da	ChEBI ↗
Formal charge	0	ChEBI ↗
ChEBI identifier	CHEBI:15727	ChEBI ↗

Cross-source molecular data

PubChem

Molar mass	226.23 g/mol	PubChem ↗
Exact mass	226.10659032 Da	PubChem ↗
Computed XLogP	-4	PubChem ↗
Topological polar surface area (Å²)	121	PubChem ↗
H-bond donors	4	PubChem ↗
H-bond acceptors	5	PubChem ↗
Rotatable bonds	6	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

carnosine

IUPAC name

N(alpha)-(beta-alanyl)-L-histidine

InChIKey

CQOVPNPJLQNMDC-ZETCQYMHSA-N

SMILES

NCCC(=O)N[C@@H](Cc1cncn1)C(=O)O

InChI

InChI=1S/C9H14N4O3/c10-2-1-8(14)13-7(9(15)16)3-6-4-11-5-12-6/h4-5,7H,1-3,10H2,(H,11,12)(H,13,14)(H,15,16)/t7-/m0/s1

Names & synonyms

KarnozinKarnozznN(alpha)-(beta-alanyl)-L-histidine

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

Classification & relationships

ChEBI ontology

dipeptideChEBI parent class · 46761 ↗

peptide organic molecular entity

Roles recorded in ChEBI

geroprotectorantioxidantantipsychotic agentantineoplastic agentanticonvulsantneuroprotective agentmouse metabolitehuman metaboliteDaphnia magna 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

0.00442016 mol

Uses 226.236 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 · 9 atoms

47.78%

N

Nitrogen · 4 atoms

24.77%

O

Oxygen · 3 atoms

21.22%

H

Hydrogen · 14 atoms

6.24%

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

Carnosine, the protective, anti-aging peptide. ↗Bioscience reports · 1999 Dec · PMID 10841274

Cardiovascular effects of carnosine. ↗Biochemistry. Biokhimiia · 2000 Jul · PMID 10951105

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Sources & record history

Checked 27 Sep 2026

Identity, formula, mass, synonyms & ontologyEMBL-EBI ChEBI · CHEBI:15727

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

Additional molecular descriptorsNCBI PubChem · CID 439224 · 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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