Home/Chemicals/51-67-2

Chemical substance record

Tyramine

51-67-2C₈H₁₁NO137.182 g/mol

Organic/Inorganic Small MoleculeChEBI source record

A primary amino compound obtained by formal decarboxylation of the amino acid tyrosine. — ChEBI

Safety references

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Identity & molecular properties

Source-linked values

CAS number	51-67-2	ChEBI ↗
Molecular formula	C₈H₁₁NO	ChEBI ↗
Molar mass	137.182 g/mol	ChEBI ↗
Monoisotopic mass	137.08406 Da	ChEBI ↗
Formal charge	0	ChEBI ↗
ChEBI identifier	CHEBI:15760	ChEBI ↗

Cross-source molecular data

PubChem

Molar mass	137.18 g/mol	PubChem ↗
Exact mass	137.084063974 Da	PubChem ↗
Computed XLogP	1.1	PubChem ↗
Topological polar surface area (Å²)	46.3	PubChem ↗
H-bond donors	2	PubChem ↗
H-bond acceptors	2	PubChem ↗
Rotatable bonds	2	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

tyramine

IUPAC name

4-(2-aminoethyl)phenol

InChIKey

DZGWFCGJZKJUFP-UHFFFAOYSA-N

SMILES

NCCc1ccc(O)cc1

InChI

InChI=1S/C8H11NO/c9-6-5-7-1-3-8(10)4-2-7/h1-4,10H,5-6,9H2

Names & synonyms

4-(2-aminoethyl)phenol

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

Classification & relationships

ChEBI ontology

monoamine molecular messengerChEBI parent class · 25375 ↗tyraminesChEBI parent class · 27175 ↗primary amino compoundChEBI parent class · 50994 ↗

phenols organic molecular entity

Roles recorded in ChEBI

neurotransmitterEC 3.1.1.8 (cholinesterase) inhibitorantiparkinson drugvasoconstrictor agentmouse metaboliteEscherichia coli metabolitehuman 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

0.00728959 mol

Uses 137.182 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 · 8 atoms

70.04%

O

Oxygen · 1 atom

11.66%

N

Nitrogen · 1 atom

10.21%

H

Hydrogen · 11 atoms

8.08%

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

Linezolid, a novel oxazolidinone antibiotic: assessment of monoamine oxidase inhibition using pressor response to oral tyramine. ↗Journal of clinical pharmacology · 2001 May · PMID 11361052

Is Na(+) required for the binding of dopamine, amphetamine, tyramine, and octopamine to the human dopamine transporter? ↗Naunyn-Schmiedeberg's archives of pharmacology · 2002 Apr · PMID 11919655

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Sources & record history

Checked 27 Sep 2026

Identity, formula, mass, synonyms & ontologyEMBL-EBI ChEBI · CHEBI:15760

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

Additional molecular descriptorsNCBI PubChem · CID 5610 · 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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