| Identification | Back Directory | [Name]
METHACHOLINE BROMIDE | [CAS]
333-31-3 | [Synonyms]
Methacholine
MECHOLYL BROMIDE
METHACHOLINE BROMIDE
METHYLCHOLINE BROMIDE
(2-HYDROXYPROPYL)TRIMET
ACETYL-β-METHYLCHOLINEBROMID
Acetyl-β-methylcholine bromide
ACETYL-B-METHYLCHOLINE BROMIDE
acetyl á-methylcholine bromide
ACETYL SS-METHYLCHOLINE BROMIDE
beta-Methylacetylcholine bromide
O-Acetyl-β-methylcholine bromide
rac-(R*)-O-Acetyl-β-methylcholine
ACETYL-BETA-METHYLCHOLINE BROMIDE
Acetyl choline Methyl broMide -β-
O-ACETYL-BETA-METHYLCHOLINE BROMIDE
Acetyl-beta-methylcholine bromide,99%
TRIMETHYL-B-ACETOXYPROPYLAMMONIUM BROMIDE
TriMethyl-β-acetoxypropylaMMoniuM broMide
ACETYL-B-METHYLCHOLINE BROMIDECRYSTALLIN E
(2-ACETOXYPROPYL)TRIMETHYLAMMONIUM BROMIDE
Trimethyl-beta-acetoxypropylammonium bromide
2-Acetoxy-N,N,N-trimethylpropan-1-aminium bromide
(2-HYDROXYPROPYL)TRIMETHYLAMMONIUM BROMIDE ACETATE
2-(acetyloxy)-n,n,n-trimethyl-1-propanaminiubromide
O-Acetyl-beta-methylcholine Bromide
Mecholyl Bromide
2(Acetyloxy)-N,N,N-triMethyl-1-propanaMiniuM broMide
1-Propanaminium,2-(acetyloxy)-N,N,N-trimethyl-,bromide | [EINECS(EC#)]
206-372-2 | [Molecular Formula]
C8H18BrNO2 | [MDL Number]
MFCD00011816 | [MOL File]
333-31-3.mol | [Molecular Weight]
240.14 |
| Hazard Information | Back Directory | [Chemical Properties]
WHITE CRYSTALLINE POWDER | [Uses]
Acetyl-β-methylcholine bromide (methylcholine bromide, methacholine bromide, Mch), a muscarinic acetylcholine receptor agonist, may be used in studies that involve the indentification, characterization and mechanism of action of muscarinic acetylcholine receptors. Mch may be used as a reference material in procedures used to detect or quantify its presence. | [Uses]
Methacholine is used only for bronchial hyperreactivity diagnostics. A synonym of
this drug is provocholine. | [General Description]
Methacholine can exist as (S) and (R) enantiomers.Although the chemical is used as the racemic mixture, itsmuscarinic activity resides principally in the (S)-isomer.The (S)/(R) ratio of muscarinic potency for these enantiomersis 240:1. | [Mechanism of action]
A minor structural change is the presence of a methyl group at the β-carbon atom of
choline, which results in two main changes in the pharmacological profile of the molecule.
Unlike acetylcholine, methacholine is hydrolyzed only by acetylcholinesterase, and the
rate of hydrolysis is significantly less than with acetylcholine. Thus, the action of methacholine is significantly longer lasting than acetylcholine. Moreover, the presence of a
methyl group at the β-carbon of choline provides the compound with a greater selectivity
of action. Methacholine directly acts on muscarinic receptors of smooth muscle, glands,and the heart, and it has a very weak effect on nicotinic receptors of the autonomic ganglions of skeletal muscle. | [Synthesis]
Methacholine, 1-acetoxy-2-(N,N,N-trimethyl)propyl ammonium chloride
(13.1.4) or acetyl-β-methylcholine can be synthesized by any of the methods described
above [8] |
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