Idazoxan HCl

    WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 530009

CAS#: 79944-56-2 (HCl)

Description: An alpha2-adrenoceptor antagonist potentially for the treatment of schizophrenia.

Chemical Structure

Idazoxan HCl
CAS# 79944-56-2 (HCl)

Theoretical Analysis

MedKoo Cat#: 530009
Name: Idazoxan HCl
CAS#: 79944-56-2 (HCl)
Chemical Formula: C11H13ClN2O2
Exact Mass: 240.07
Molecular Weight: 240.69
Elemental Analysis: C, 54.89; H, 5.44; Cl, 14.73; N, 11.64; O, 13.29

Price and Availability

Size Price Availability Quantity
50.0mg USD 230.0 2 Weeks
100.0mg USD 360.0 2 Weeks
Bulk inquiry

Related CAS #: 79944-56-2 (HCl)   79944-58-4 (free base)    

Synonym: RX 781094A; RX-781094A; RX781094A; RX-781094; RX781094; RX 781094; Idazoxan HCl; Idazoxan hydrochloride;

IUPAC/Chemical Name: 2-(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)-4,5-dihydro-1H-imidazole hydrochloride


InChi Code: InChI=1S/C11H12N2O2.ClH/c1-2-4-9-8(3-1)14-7-10(15-9)11-12-5-6-13-11;/h1-4,10H,5-7H2,(H,12,13);1H


Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 240.69 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

Molarity Calculator

Calculate the mass, volume, or concentration required for a solution.

*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and SDS / CoA (available online).

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Dilution Calculator

Calculate the dilution required to prepare a stock solution.

1: Haass-Koffler CL, Leggio L, Davidson D, Swift RM. Effects of idazoxan on alcohol pharmacokinetics and intoxication: a preliminary human laboratory study. Alcohol Clin Exp Res. 2015 Apr;39(4):594-602. doi: 10.1111/acer.12658. PubMed PMID: 25833022; PubMed Central PMCID: PMC4384190.


3: Wang XS, Fang HL, Chen Y, Liang SS, Zhu ZG, Zeng QY, Li J, Xu HQ, Shao B, He JC, Hou ST, Zheng RY. Idazoxan reduces blood-brain barrier damage during experimental autoimmune encephalomyelitis in mouse. Eur J Pharmacol. 2014 Aug 5;736:70-6. doi: 10.1016/j.ejphar.2014.04.034. PubMed PMID: 24797785.

4: Rusu G, Mititelu-Tartau L, Lupusoru CE, Lupusoru RV, Grigoraş I, Popa G, Nechifor M. Imidazoline receptor antagonists idazoxan and efaroxan enhance locomotor functions in rats. Rev Med Chir Soc Med Nat Iasi. 2015 Jan-Mar;119(1):193-200. PubMed PMID: 25970966.

5: Khokhar JY, Chau DT, Dawson R, Green AI. Clozapine reconstructed: Haloperidol's ability to reduce alcohol intake in the Syrian golden hamster can be enhanced through noradrenergic modulation by desipramine and idazoxan. Drug Alcohol Depend. 2015 Jul 1;152:277-81. doi: 10.1016/j.drugalcdep.2015.04.003. PubMed PMID: 25979645; PubMed Central PMCID: PMC4458150.

6: Larrauri JA, Levin ED. The α₂-adrenergic antagonist idazoxan counteracts prepulse inhibition deficits caused by amphetamine or dizocilpine in rats. Psychopharmacology (Berl). 2012 Jan;219(1):99-108. doi: 10.1007/s00213-011-2377-2. PubMed PMID: 21710169.

7: Buck K, Voehringer P, Ferger B. The alpha(2) adrenoceptor antagonist idazoxan alleviates L-DOPA-induced dyskinesia by reduction of striatal dopamine levels: an in vivo microdialysis study in 6-hydroxydopamine-lesioned rats. J Neurochem. 2010 Jan;112(2):444-52. doi: 10.1111/j.1471-4159.2009.06482.x. PubMed PMID: 19895663.

8: Wang XS, Chen YY, Shang XF, Zhu ZG, Chen GQ, Han Z, Shao B, Yang HM, Xu HQ, Chen JF, Zheng RY. Idazoxan attenuates spinal cord injury by enhanced astrocytic activation and reduced microglial activation in rat experimental autoimmune encephalomyelitis. Brain Res. 2009 Feb 9;1253:198-209. doi: 10.1016/j.brainres.2008.11.059. PubMed PMID: 19083996.

9: Gooneratne SR. Effects of clonidine and idazoxan on tetrathiomolybdate-induced copper and lysosomal enzyme excretion into sheep bile. Res Vet Sci. 2012 Jun;92(3):456-61. doi: 10.1016/j.rvsc.2011.04.013. PubMed PMID: 21570700.

10: Semenova S, Markou A. The alpha2 adrenergic receptor antagonist idazoxan, but not the serotonin-2A receptor antagonist M100907, partially attenuated reward deficits associated with nicotine, but not amphetamine, withdrawal in rats. Eur Neuropsychopharmacol. 2010 Oct;20(10):731-46. doi: 10.1016/j.euroneuro.2010.05.003. PubMed PMID: 20627663; PubMed Central PMCID: PMC3545706.

11: Timofeeva OA, Levin ED. Idazoxan blocks the nicotine-induced reversal of the memory impairment caused by the NMDA glutamate receptor antagonist dizocilpine. Pharmacol Biochem Behav. 2008 Sep;90(3):372-81. doi: 10.1016/j.pbb.2008.03.011. PubMed PMID: 18456310.

12: Knight J, Harley CW. Idazoxan increases perforant path-evoked EPSP slope paired pulse inhibition and reduces perforant path-evoked population spike paired pulse facilitation in rat dentate gyrus. Brain Res. 2006 Feb 9;1072(1):36-45. PubMed PMID: 16426582.

13: Fara-On M, Evans JH, Harley CW. Idazoxan activates rat forebrain glycogen phosphorylase in vivo: a histochemical study. Brain Res. 2005 Oct 12;1059(1):83-92. PubMed PMID: 16226229.

14: Srinivasan J, Schmidt WJ. Serotonergic influence on the potentiation of D-amphetamine and apomorphine-induced rotational behavior by the alpha2-adrenoceptor antagonist 2-methoxy idazoxan in hemiparkinsonian rats. J Neural Transm (Vienna). 2005 Sep;112(9):1223-36. PubMed PMID: 15614426.

15: Eilon GF, Weisenthal L, Stupecky M, Landucci G, Slater LM. Antineoplastic activity of idazoxan hydrochloride. Cancer Chemother Pharmacol. 2009 Nov;64(6):1157-63. doi: 10.1007/s00280-009-0978-9. PubMed PMID: 19308411; PubMed Central PMCID: PMC2728905.

16: Serban DN, Serban IL, Nechifor M. Idazoxan effects upon contractile activity in the rat aorta are related to alpha adrenoceptors and L-type channels. Fundam Clin Pharmacol. 2004 Dec;18(6):635-41. PubMed PMID: 15548234.

17: Srinivasan J, Schmidt WJ. Treatment with alpha2-adrenoceptor antagonist, 2-methoxy idazoxan, protects 6-hydroxydopamine-induced Parkinsonian symptoms in rats: neurochemical and behavioral evidence. Behav Brain Res. 2004 Oct 5;154(2):353-63. PubMed PMID: 15313023.

18: Srinivasan J, Schmidt WJ. The effect of the alpha2-adrenoreceptor antagonist idazoxan against 6-hydroxydopamine-induced Parkinsonism in rats: multiple facets of action? Naunyn Schmiedebergs Arch Pharmacol. 2004 Jun;369(6):629-38. PubMed PMID: 15118809.

19: Invernizzi RW, Garavaglia C, Samanin R. The alpha 2-adrenoceptor antagonist idazoxan reverses catalepsy induced by haloperidol in rats independent of striatal dopamine release: role of serotonergic mechanisms. Neuropsychopharmacology. 2003 May;28(5):872-9. PubMed PMID: 12644843.

20: Shouse MN, Scordato JC, Farber PR, de Lanerolle N. The alpha2 adrenoreceptor agonist clonidine suppresses evoked and spontaneous seizures, whereas the alpha2 adrenoreceptor antagonist idazoxan promotes seizures in amygdala-kindled kittens. Brain Res. 2007 Mar 16;1137(1):58-68. PubMed PMID: 17214976.

Additional Information

Related CAS#
79944-58-4(Idazoxan free base)
79944-56-2(Idazoxan HCl)