CAS No. 81161-17-3

Batch: Purity:99.43
Esmolol HCl Chemical Structure
Chemical Structure
Check the Esmolol HCl product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

CAS Number 81161-17-3
Molecular Formula

C16H25NO4.HCl

Molecular Weight (MW) 331.83
SMILES CC(C)NCC(COC1=CC=C(C=C1)CCC(=O)OC)O.Cl

Ordering Information

Biological Activity

Esmolol HCl is a cardioselective beta-1 adrenergic receptor antagonist that selectively binds to beta-1 adrenergic receptors. Blockade of these receptors inhibits catecholamine-induced activation of adenylate cyclase, resulting in reduced intracellular cyclic AMP levels and suppressed protein kinase A signaling. Consequently, esmolol attenuates sympathetic stimulation in cardiac tissue, reducing sinoatrial node automaticity and slowing atrioventricular nodal conduction. [1]

How to Prepare Stock Solution?

Concentration Volume Mass
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Solubility

Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
Solvent Solubility & Note
DMSO 66 mg/mL (198.89 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Water 66 mg/mL
Ethanol 66 mg/mL
FAQ
Q: Why does a DMSO stock precipitate in media/saline?
A: It is caused by unheated aqueous media (supersaturation), local solvent shock, or incorrect mixing sequence.
How to fix it?
  • Preheat media/saline to 37°C.
  • Mix rapidly (pipette/vortex) upon addition.
  • For complex mixes, always add the aqueous phase last.
  • Re-dissolve minor precipitates with a 37°C water bath and sonication (≤30 min).

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Note: Technical data last updated: Sep 1, 2026.