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Esters and lactones

Methacholine

Also known as Acetylmethylcholine, beta-Methylacetylcholine, Acetyl-beta-methylcholine

CAS 55-92-5Formula C8H18NO2+Molar mass 160.24 g/mol
9 suppliers listed Drug substance
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Methacholine chemical structure, C8H18NO2+, CAS 55-92-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
55-92-5
Formula
C8H18NO2+
Molar mass
160.24 g/mol
HS code
292390
Category
Esters and lactones

What is Methacholine?

Plain description, key identifiers and synonyms

Methacholine is a quaternary ammonium ion in which the nitrogen is substituted with three methyl groups and a 2-acetoxypropyl group. Parasympathomimetic bronchoconstrictor drug used in clinical diagnosis. It has a role as a vasodilator agent, a cholinergic agonist, a muscarinic agonist, a bronchoconstrictor agent and an epitope. It is a quaternary ammonium ion and an acetate ester.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-acetyloxypropyl(trimethyl)azanium
CAS number
55-92-5 CAS number cross-checked
Molecular formula
C8H18NO2+
UNII
03V657ZD3V
InChIKey
NZWOPGCLSHLLPA-UHFFFAOYSA-N
InChI
InChI=1S/C8H18NO2/c1-7(11-8(2)10)6-9(3,4)5/h7H,6H2,1-5H3/q+1
SMILES (canonical and isomeric)
CC(C[N+](C)(C)C)OC(=O)C

Synonyms

  • Acetylmethylcholine
  • beta-Methylacetylcholine
  • Acetyl-beta-methylcholine
  • Methacholine ion
  • Methacholine cation
  • 2-acetyloxypropyl(trimethyl)azanium
  • 2-acetyloxypropyl-trimethylazanium
  • [2-(acetyloxy)propyl]trimethylazanium
  • (2-(acetyloxy)propyl)trimethylazanium
  • Mecholin
  • MCH, Mecholin
  • Methacholin
  • Methacholinum
  • Choline, acetyl-beta-methyl-
  • 2-acetoxypropyl(trimethyl)ammonium, chloride
  • 2-(acetyloxy)-n,n,n-trimethylpropan-1-aminium
  • 1-Propanaminium, 2-(acetyloxy)-N,N,N-trimethyl-
  • Ammonium, (2-hydroxypropyl)trimethyl-, acetate (ester)
  • PDSP1_000136
  • PDSP2_000135
  • 2-acetoxy-N,N,N-trimethylpropan-1-aminium
  • 2-acetyloxy-N,N,N-trimethylpropan-1-aminium
  • 2-acetyloxypropyl(trimethyl)ammonium, chloride
  • 1-Propanaminium, 2-(acetyloxy)-N,N,N-trimethyl-, (+/-)-

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
160.24 g/molcalc.
Exact mass
160.1332 Dacalc.
LogP (octanol/water)
0.64calc.
Topological polar surface area
26.3 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
3calc.
Heavy atoms
11calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.88calc.
Formal charge
1calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Methacholine suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 9 suppliers
9 of 9 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

9 suppliers in 4 countries

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Methacholine price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Use classes: Pharmaceuticals.

Roles

  • anti-asthmatic agent
  • bronchoconstrictor agent
  • cardiovascular drug
  • cholinergic agonist
  • cholinergic drug
  • epitope
  • muscarinic agonist
  • neurotransmitter agent
  • pharmaceutical
  • vasodilator agent

Pharmacology

Methacholine is a Cholinergic Receptor Agonist. The mechanism of action of methacholine is as a Cholinergic Agonist.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • Active ingredient in FDA approved drug labels

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Methacholine is traded under.

HS 2923.90Indicative HS code

Quaternary ammonium salts and hydroxides whether or not chemically defined not elsewhere classified…

World exports in 2024
$1.07B
+14.4% vs 2023, imports $1.16B
2019 to 2024
Top exporters
  1. China36.7%
  2. United States14.2%
  3. Netherlands9.4%
Top importers
  1. South Korea10.7%
  2. Germany10.1%
  3. United States9.9%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Methacholine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Methacholine, based on the data on this page

What is Methacholine?

Methacholine is a quaternary ammonium ion in which the nitrogen is substituted with three methyl groups and a 2-acetoxypropyl group. Parasympathomimetic bronchoconstrictor drug used in clinical diagnosis.

What is the CAS number of Methacholine?

The CAS registry number of Methacholine is 55-92-5.

What is the molecular formula and weight of Methacholine?

The molecular formula of Methacholine is C8H18NO2+ and its molar mass is 160.24 g/mol.

What is Methacholine used for?

Use classes: Pharmaceuticals.

Is Methacholine hazardous?

No GHS hazard classification for Methacholine is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Methacholine?

Methacholine is usually classified under HS code 292390 (Quaternary ammonium salts and hydroxides, lecithins and other phosphoaminolipids…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Methacholine?

CompoundList lists 9 suppliers of Methacholine in China, Spain, Hungary and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Methacholine?

Suppliers quote Methacholine on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Methacholine

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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