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Clonidine hydrochloride (Catapres) is a centrally active α-adrenergic agonist used predominantly as an antihypertensive agent.

| Pack Size | Price | USA Warehouse | Global Warehouse | Quantity |
|---|---|---|---|---|
| 500 mg | $30 | In Stock | In Stock | |
| 1 mL x 10 mM (in DMSO) | $30 | In Stock | In Stock |
| Description | Clonidine hydrochloride (Catapres) is a centrally active α-adrenergic agonist used predominantly as an antihypertensive agent. |
| In vitro | Clonidine, at concentrations of 0.01, 0.1, or 1 μM, significantly elevates CGRP (α and β) mRNA expression in endothelial cells in a dose-dependent manner. Additionally, a 24-hour treatment with 1 μM clonidine notably augments NO levels in these cells. This indicates that the NO pathway plays a crucial role in modulating the clonidine-induced CGRP production[2]. |
| In vivo | Administered intraperitoneally at a dose of 50 μg/kg, clonidine markedly reduces rat body temperature, peaking at 1 hour and persisting for 3 hours; this effect is notably counteracted by a pre-administration of phentolamine into the cerebral ventricles[1]. Additionally, clonidine (0.003-0.05 mg/kg, i.p.) effectively inhibits PCP-induced dopamine release in the prefrontal cortex, an effect that is blocked by the alpha-2A receptor antagonist BRL-44408[3]. In normotensive rats treated with DMSO, clonidine (0.6 μg intracisternally) does not alter blood pressure, but following central adenosine A1R inhibition with DPCPX, it significantly lowers blood pressure. Conversely, in DMSO-treated aortic-banded rats, clonidine prominently decreases blood pressure, a response that remains unchanged after DPCPX pretreatment. Additionally, in SO rats with central A1R blockage, clonidine not only reduces blood pressure but also significantly elevates pERK1/2 levels in the RVLM, an effect not observed in DMSO-pretreated SO rats. Similarly, clonidine boosts RVLM pERK1/2 levels in vehicle-treated aortic-banded rats, unaffected by DPCPX[4]. |
| Synonyms | Clonidine HCl, Catapres |
| Molecular Weight | 266.55 |
| Formula | C9H10Cl3N3 |
| Cas No. | 4205-91-8 |
| Smiles | Cl.ClC1=CC=CC(Cl)=C1NC1=NCCN1 |
| Relative Density. | no data available |
| Storage | In solvent: -80°C for 1 year | Shipping with blue ice/Shipping at ambient temperature. | ||||||||||||||||||||||||||||||||||||||||
| Solubility Information | H2O: 26.7 mg/mL (100.17 mM), Sonication is recommended. DMSO: 23.33 mg/mL (87.53 mM), Sonication is recommended. | ||||||||||||||||||||||||||||||||||||||||
Solution Preparation Table | |||||||||||||||||||||||||||||||||||||||||
DMSO/H2O
H2O
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Dissolve 2 mg of the compound in 100 μL DMSO
to obtain a stock solution at a concentration of 20 mg/mL . If the required concentration exceeds the compound's known solubility, please contact us for technical support before proceeding.
1) Add 100 μL of the DMSO
stock solution to 400 μL PEG300
and mix thoroughly until the solution becomes clear.
2) Add 50 μL Tween 80 and mix well until fully clarified.
3) Add 450 μL Saline,PBS or ddH2O
and mix thoroughly until a homogeneous solution is obtained.
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