Chemical substance record

Amezinium

41658-78-0C₁₁H₁₂N₃O202.237 g/mol

Organic/Inorganic Small MoleculeChEBI source record

A pyridazinium ion that is pyridazin-1-ium which is substituted by a phenyl, amino and methoxy groups at positions 1, 4 and 6, respectively. — ChEBI

Safety references

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Identity & molecular properties

Source-linked values

CAS number	41658-78-0	ChEBI ↗
Molecular formula	C₁₁H₁₂N₃O	ChEBI ↗
Molar mass	202.237 g/mol	ChEBI ↗
Monoisotopic mass	202.09749 Da	ChEBI ↗
Formal charge	1	ChEBI ↗
ChEBI identifier	CHEBI:145698	ChEBI ↗

Cross-source molecular data

PubChem

Molar mass	202.23 g/mol	PubChem ↗
Exact mass	202.098037015 Da	PubChem ↗
Computed XLogP	1.8	PubChem ↗
Topological polar surface area (Å²)	52	PubChem ↗
H-bond donors	1	PubChem ↗
H-bond acceptors	3	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

amezinium

IUPAC name

4-amino-6-methoxy-1-phenylpyridazin-1-ium

InChIKey

VXROHTDSRBRJLN-UHFFFAOYSA-O

SMILES

COc1cc(N)cn[n+]1-c1ccccc1

InChI

InChI=1S/C11H11N3O/c1-15-11-7-9(12)8-13-14(11)10-5-3-2-4-6-10/h2-8,12H,1H3/p+1

Names & synonyms

4-amino-6-methoxy-1-phenylpyridazin-1-ium

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

Classification & relationships

ChEBI ontology

pyridazinium ionChEBI parent class · 145699 ↗aromatic etherChEBI parent class · 35618 ↗primary arylamineChEBI parent class · 50471 ↗

amine ether organic molecular entity

Roles recorded in ChEBI

antihypotensive agentsympathomimetic agentadrenergic uptake inhibitorEC 1.4.3.4 (monoamine oxidase) inhibitor

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

0.00494469 mol

Uses 202.237 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 · 11 atoms

65.33%

N

Nitrogen · 3 atoms

20.78%

O

Oxygen · 1 atom

7.91%

H

Hydrogen · 12 atoms

5.98%

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

In vitro effect of amezinium on the rabbit urinary bladder: muscle strip and whole bladder evaluation. ↗International urology and nephrology · 1999 · PMID 10481962

Effect of midodrine on chlorpromazine-induced orthostatic hypotension in rabbits: comparison with amezinium, etilefrine and droxidopa. ↗Biological & pharmaceutical bulletin · 2000 Dec · PMID 11145175

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Sources & record history

Checked 27 Sep 2026

Identity, formula, mass, synonyms & ontologyEMBL-EBI ChEBI · CHEBI:145698

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

Additional molecular descriptorsNCBI PubChem · CID 71927 · 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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