Name: Prazosin
Brand: Selleck Chemicals
SKU: S5780
Availability: InStock
Rating: 5 (4 reviews)

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Quality Control

Batch: S578001 DMSO]77 mg/mL]false]Water]Insoluble]false]Ethanol]Insoluble]false Purity: 99.81%

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COA
NMR
HPLC
SDS/MSDS
Datasheet

99.81

Related Targets	AChR 5-HT Receptor COX Calcium Channel Histamine Receptor Dopamine Receptor GABA Receptor TRP Channel Cholinesterase (ChE) GluR
Other Adrenergic Receptor Inhibitors	ICI 118551 Hydrochloride (Zenidolol) L755507 Yohimbine HCl Atipamezole Higenamine hydrochloride Noradrenaline bitartrate monohydrate Fenoterol hydrobromide Medetomidine HCl Isoprenaline L-Adrenaline

Solubility

In vitro
Batch:

DMSO : 77 mg/mL (200.83 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Ethanol : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
Mass value Mass unit	Concentration value Concentration unit	Volume value Volume unit	Molecular weight (g/mol)

Dilution Calculator Molecular Weight Calculator

In vivo batch selection In vivo Batch:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 40%PEG300 2 5%Tween80 3 50%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	3.85mg/ml (10.04mM)	Taking the 1 mL working solution as an example, add 50 μL of 77 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Clear solution	5% DMSO 1 95% Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.55mg/ml (1.43mM)	Taking the 1 mL working solution as an example, add 50 μL of 11 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

Dosage: mg/kg

Average weight of animals: g

Dosing volume per animal: μL

Number of animals:

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO

%

% Tween 80

% ddH₂O

% DMSO

+

%

Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Chemical Information, Storage & Stability

Molecular Weight	383.40	Formula	C₁₉H₂₁N₅O₄	Storage (From the date of receipt)	3 years -20°C powder
CAS No.	19216-56-9	--		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	N/A			SMILES	COC1=C(C=C2C(=C1)C(=NC(=N2)N3CCN(CC3)C(=O)C4=CC=CO4)N)OC

Read more about storage stability stock solution CAS number SMILES

Mechanism of Action

Targets/IC₅₀/Ki	α1-adrenergic receptor
References	[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5079574/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2026-07-06)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT06629090	RECRUITING	Magnetic Resonance Imaging; Cerebrovascular Circulation	University of Wisconsin, Madison	2025-12-17	PHASE2
NCT06629077	RECRUITING	Magnetic Resonance Imaging; Cerebrovascular Circulation	University of Wisconsin, Madison	2026-02-26	PHASE2
NCT04793685	RECRUITING	Alcohol Withdrawal	Yale University	2021-07-01	PHASE2
NCT07231978	COMPLETED	Healthy	Pfizer	2025-11-14	PHASE1
NCT03539614	ACTIVE_NOT_RECRUITING	Posttraumatic Stress Disorder	VA Office of Research and Development	2018-06-04	PHASE3
NCT04721353	COMPLETED	Cannabis Dependence; Posttraumatic Stress Disorder; Cannabis Use Disorder	VA Puget Sound Health Care System	2020-11-09	PHASE4

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Prazosin Adrenergic Receptor antagonist

Chemical Structure

Molecular Weight: 383.40