Homatropine hydrobromide

氢溴酸后马托品

Also known as: Homatropine bromide, DL-Homatropine hydrobromide, (±)-Homatropine hydrobromide, Mandelic acid, tropine ester, hydrobromide, Tropine mandelate hydrobromide, alpha-Hydroxybenzeneacetic acid 8-methyl-8-azabicyclo[3.2.1]oct-3-yl ester hydrobromide, endo-8-Methyl-8-azabicyclo[3.2.1]octan-3-yl 2-hydroxy-2-phenylacetate hydrobromide

Homatropine hydrobromide (CAS 51-56-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C16H22BrNO3 and a molecular weight of 356.25500 g/mol. It is also known as Homatropine bromide, DL-Homatropine hydrobromide and (±)-Homatropine hydrobromide. Key properties include a melting point of 214-217 °C, a boiling point of 434.9ºC at 760 mmHg, a density of 1.21g/cm3 and a flash point of 216.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 51-56-9
Jingsj CID: J-47467-8
Molecular Formula: C₁₆H₂₂BrNO₃
Chinese Name: 氢溴酸后马托品
Molecular Weight: 356.25500 g/mol
Category: Organic Acids
Last updated: 8/21/2026

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	214-217 °C
Boiling Point	434.9ºC at 760 mmHg
Density	1.21g/cm3
Flash Point	216.8ºC
Exact Mass	355.07800
PSA	49.77000
LogP	2.78440
Additional Property	soluble

Activity & Biological Data

Additional Information	[1]. Leung, E. and F. Mitchelson, Modification by hexamethonium of the muscarinic receptors blocking activity of pancuronium and homatropine in isolated tissues of the guinea-pig. Eur J Pharmacol, 1982. 80(1): p. 11-7. [2]. Gilani, S.A. and L.B. Cobbin, Interaction of himbacine with carbachol at muscarinic receptors of heart and smooth muscle. Arch Int Pharmacodyn Ther, 1987. 290(1): p. 46-53. [3]. Cramer, M.B., L.A. Cates, and D.E. Clarke, Rectal absorption of homatropine [14C]methylbromide in the rat. J Pharm Pharmacol, 1978. 30(5): p. 284-6.

Additional Information

[1]. Leung, E. and F. Mitchelson, Modification by hexamethonium of the muscarinic receptors blocking activity of pancuronium and homatropine in isolated tissues of the guinea-pig. Eur J Pharmacol, 1982. 80(1): p. 11-7. [2]. Gilani, S.A. and L.B. Cobbin, Interaction of himbacine with carbachol at muscarinic receptors of heart and smooth muscle. Arch Int Pharmacodyn Ther, 1987. 290(1): p. 46-53. [3]. Cramer, M.B., L.A. Cates, and D.E. Clarke, Rectal absorption of homatropine [14C]methylbromide in the rat. J Pharm Pharmacol, 1978. 30(5): p. 284-6.

Customs & Trade Information

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of Homatropine hydrobromide?

The CAS number of Homatropine hydrobromide is 51-56-9.

What are the molecular formula and molecular weight of Homatropine hydrobromide?

Homatropine hydrobromide has molecular formula C16H22BrNO3 and molecular weight 356.25500 g/mol.

What are the upstream and downstream products of Homatropine hydrobromide?

For Homatropine hydrobromide, Downstream Products: (R)-(-)-Mandelic acid, Tropine.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Homatropine hydrobromide (CAS 51-56-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-47467-8 (accessed 2026-10-28).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.