Riociguat | Guanylate Cyclase agonist | 10+ Citations | In Stock

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Quality Control

Batch: Purity: 99.94%

99.94

Related Targets	CXCR Hedgehog/Smoothened PKA Adrenergic Receptor AChR 5-HT Receptor Histamine Receptor Dopamine Receptor Ras KRas
Other Guanylate Cyclase Inhibitors	YC-1 (Lificiguat) ODQ BAY 41-2272

Solubility

In vitro
Batch:

DMSO : 84 mg/mL (198.85 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.
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.	4.250mg/ml (10.06mM)	Taking the 1 mL working solution as an example, add 50 μL of 85 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.	0.250mg/ml (0.59mM)	Taking the 1 mL working solution as an example, add 50 μL of 5 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	422.42	Formula	C₂₀H₁₉FN₈O₂	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	625115-55-1	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	BAY 63-2521			SMILES	CN(C1=C(N=C(N=C1N)C2=NN(C3=C2C=CC=N3)CC4=CC=CC=C4F)N)C(=O)OC

Read more about storage stability stock solution CAS number SMILES

Mechanism of Action

Targets/IC₅₀/Ki	guanylate cyclase
In vitro	BAY 63-2521 stimulates the recombinant sGC concentration dependently from 0.1 to 100 μM with a two-fold to 73-fold effect by an NO-independent but haem-dependent mechanism. Riociguat inhibits platelet function in washed platelets but not in whole blood, and exerts no direct effects on contractility and relaxation of cardiac myocytes.
In vivo	In chronic treatment of hypoxic mice and MCT-injected rats, Riociguat (10 mg/kg/d, p.o.) partially reverses the pulmonary arterial hypertension, the right heart hypertrophy and the structural remodelling of the lung vasculature.
References	[1] https://pubmed.ncbi.nlm.nih.gov/18550612/ [2] https://pubmed.ncbi.nlm.nih.gov/26282717/ [3] https://pubmed.ncbi.nlm.nih.gov/26407652/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2026-06-12)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT07644377	NOT_YET_RECRUITING	CTEPH	Assistance Publique - Hôpitaux de Paris	2026-10-01	PHASE3
NCT05825417	ACTIVE_NOT_RECRUITING	Pulmonary Arterial Hypertension	Sheffield Teaching Hospitals NHS Foundation Trust	2023-06-14	PHASE4
NCT06922240	RECRUITING	Chronic Thromboembolic Pulmonary Hypertension	Suqiao Yang	2025-03-21	PHASE3
NCT06715280	RECRUITING	Chronic Thromboembolic Pulmonary Hypertension	Chinese University of Hong Kong	2024-07-25	PHASE4
NCT05140525	TERMINATED	CTEPH	Dr Sudarshan Rajagopal	2025-01-27	PHASE3
NCT04062565	RECRUITING	Pulmonary Arterial Hypertension	University of Arizona	2019-03-25	PHASE3

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Riociguat Guanylate Cyclase agonist

Chemical Structure

Molecular Weight: 422.42