Hydralazine HCl

For research use only.

Catalog No.S2562

2 publications

Hydralazine HCl Chemical Structure

CAS No. 304-20-1

Hydralazine HCl is a hydrochloride salt of hydralazine, which is a direct-acting smooth muscle relaxant used to treat hypertension by acting as a vasodilator primarily in arteries and arterioles.

Selleck's Hydralazine HCl has been cited by 2 publications

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Biological Activity

Description Hydralazine HCl is a hydrochloride salt of hydralazine, which is a direct-acting smooth muscle relaxant used to treat hypertension by acting as a vasodilator primarily in arteries and arterioles.
Potassium Channel [1]
In vitro

Hydralazine impairs up-regulation of RAG-2 gene expression and reduces secondary Ig gene rearrangements. Hydralazine subverts B lymphocyte tolerance to self and contributes to generation of pathogenic autoreactivity by disrupting receptor editing. [1] Hydralazine directly scavenges free acrolein, decreasing intracellular acrolein availability and thereby suppressing macromolecular adduction. Hydralazine inhibits cross-linking if adding 30 min after commencing acrolein exposure but is ineffective if added after a 90-min delay. [2] Hydralazine (0.1-10 mM) inhibits both extracellular and intracellular ROS production by inflammatory macrophages, by a ROS-scavenging mechanism probably affecting superoxide radical (O(2)(*-))-generation by xanthine oxidase (XO) and nicotinamide adenine dinucleotide/nicotinamide adenine dinucleotide phosphate (NADH/NADPH) oxidase. Hydralazine (0.1-10 mM) significantly reduces NO(*) generation, and this effect is attributable to an inhibition of NOS-2 gene expression and protein synthesis. Hydralazine also effectively blocks COX-2 gene expression which perfectly correlated with a reduction of protein levels and PGE(2) synthesis. [3] Hydralazine protects against not only acrolein-mediated injury, but also compression in guinea pig spinal cord ex vivo. Hydralazine can significantly alleviate acrolein-induced superoxide production, glutathione depletion, mitochondrial dysfunction, loss of membrane integrity, and reduces compound action potential conduction. [4]

In vivo Hydralazine affords strong, dose-dependent protection against the increases in plasma marker enzymes but not the hepatic glutathione depletion produced by allyl alcohol in mice. [5]


Solubility (25°C)

In vitro Water 1 mg/mL (5.08 mM)
DMSO Insoluble
Ethanol Insoluble

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Chemical Information

Molecular Weight 196.64


CAS No. 304-20-1
Storage powder
in solvent
Synonyms N/A
Smiles C1=CC=C2C(=C1)C=NN=C2NN.Cl

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Clinical Trial Information

NCT Number Recruitment interventions Conditions Sponsor/Collaborators Start Date Phases
NCT04164004 Not yet recruiting Other: Kansas City Cardiomyopathy Questionnaire-12 Heart Failure Stanford University May 1 2020 Not Applicable
NCT03619317 Recruiting -- Cancer of Esophagus Aarhus University Hospital Skejby|Danish Cancer Society June 25 2018 --
NCT01587313 Completed Drug: Isosorbide dinitrate / hydralazine capsules Healthy Arbor Pharmaceuticals Inc. April 2012 Phase 1

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