Oxyphenonium bromide

Also known as: Antrenyl bromide, Oxyphenonium, Oxyphenon, Spasmophen, Subranyl, 2-(2-cyclohexyl-2-hydroxy-2-phenylacetoxy)-N,N-diethyl-N-methylethanaminium bromide, 2-[(Cyclohexylhydroxyphenylacetyl)oxy]-N,N-diethyl-N-methyl-ethanaminium bromide, ba-5473, c5473

Oxyphenonium bromide (CAS 50-10-2) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C21H34BrNO3 and a molecular weight of 428.40 g/mol. Key properties include a melting point of 189-194° from ethyl acetate + alc and a density of 1.2584 (rough estimate). It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H312 — Harmful in contact with skin and H332 — Harmful if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 50-10-2
Jingsj CID: J-49352-3
Molecular Formula: C₂₁H₃₄BrNO₃
Molecular Weight: 428.40 g/mol
Category: Organohalogen Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	189-194° from ethyl acetate + alc
Density	1.2584 (rough estimate)
Exact Mass	427.17200
PSA	46.53000
LogP	0.48810
Refractive Index	1.6200 (estimate)

GHS Safety & Compliance

IrritantSignal word: Warning

H302 — Harmful if swallowed
H312 — Harmful in contact with skin
H332 — Harmful if inhaled

Activity & Biological Data

Additional Information	[1]. Funasaki N, et al. Quantitative estimation of the bitter taste intensity of oxyphenonium bromide reduced by cyclodextrins from electromotive force measurements. Anal Chem. 1999 May 1;71(9):1733-6. [2]. Koëter GH, et al. Protective effect of oral oxyphenonium bromide, terbutaline and theophylline against the bronchial obstructive effects of inhaled histamine, acetylcholine and propranolol. Eur J Clin Pharmacol. 1984;26(4):435-41. [3]. Eglen RM, et al. Competitive and non-competitive antagonism exhibited by 'selective' antagonists at atrial and ileal muscarinic receptor subtypes. Br J Pharmacol. 1987 Apr;90(4):701-7.

Additional Information

[1]. Funasaki N, et al. Quantitative estimation of the bitter taste intensity of oxyphenonium bromide reduced by cyclodextrins from electromotive force measurements. Anal Chem. 1999 May 1;71(9):1733-6. [2]. Koëter GH, et al. Protective effect of oral oxyphenonium bromide, terbutaline and theophylline against the bronchial obstructive effects of inhaled histamine, acetylcholine and propranolol. Eur J Clin Pharmacol. 1984;26(4):435-41. [3]. Eglen RM, et al. Competitive and non-competitive antagonism exhibited by 'selective' antagonists at atrial and ileal muscarinic receptor subtypes. Br J Pharmacol. 1987 Apr;90(4):701-7.

Frequently Asked Questions

What is the CAS number of Oxyphenonium bromide?

The CAS number of Oxyphenonium bromide is 50-10-2.

What are the molecular formula and molecular weight of Oxyphenonium bromide?

Oxyphenonium bromide has molecular formula C21H34BrNO3 and molecular weight 428.40 g/mol.

Is Oxyphenonium bromide hazardous?

Oxyphenonium bromide has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H312 — Harmful in contact with skin; H332 — Harmful if inhaled.

What are the upstream and downstream products of Oxyphenonium bromide?

For Oxyphenonium bromide, Upstream Products: Ethyl benzoylformate, 2-Cyclohexylmandelic acid, Cyclohexylmagnesium bromide.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Oxyphenonium bromide (CAS 50-10-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-49352-3 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.