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Tecovirimat (ST-246) Antiviral inhibitor

Name: Tecovirimat (ST-246)
Brand: Selleck Chemicals
SKU: S3380
Availability: InStock
Rating: 5 (4 reviews)

Cat.No.S3380

Tecovirimat is an antiviral that inhibits the egress of orthopoxviruses by targeting viral p37 protein orthologs. Tecovirimat is developed for the treatment of smallpox infection.

Tecovirimat (ST-246) Antiviral inhibitor Chemical Structure

Quality Control

Batch: Purity: 99.86%

99.86

Related Targets	PD-1/PD-L1 CXCR STING AhR Immunology & Inflammation related CD markers Interleukins Anti-infection Antioxidant COX
Other Antiviral Inhibitors	Moroxydine HCl Aloperine GS-441524 NGI-1 Harringtonine Oleanolic Acid LL-37 acetate U-18666A Aloin B Lanatoside C

Solubility

In vitro
Batch:

DMSO : 75 mg/mL (199.29 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 18 mg/mL

Water : 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 Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	5.000mg/ml (13.29mM)	Taking the 1 mL working solution as an example, add 50 μL of 100 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.
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.	3.750mg/ml (9.96mM)	Taking the 1 mL working solution as an example, add 50 μL of 75 mg/ml clarified DMSO stock solution to 400 μL PEG300, mix evenly to clarify it; add 50 μL Tween80 to the above system, mix evenly to clarify it; then continue to add 500 μL 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.	1.250mg/ml (3.32mM)	Taking the 1 mL working solution as an example, add 50 μL of 25 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	376.33	Formula	C₁₉H₁₅F₃N₂O₃	Storage (From the date of receipt)	3 years -20°C powder
CAS No.	869572-92-9	--		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	SIGA-246, ST-246, TPOXX			SMILES	FC(F)(F)C1=CC=C(C=C1)C(=O)NN2C(=O)C3C4C=CC(C5CC45)C3C2=O

Read more about storage stability stock solution CAS number SMILES

Mechanism of Action

Targets/IC₅₀/Ki	p37 protein ortholog
References	[1] https://pubmed.ncbi.nlm.nih.gov/20191435/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2026-04-02)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT04957485	ACTIVE_NOT_RECRUITING	Smallpox	SIGA Technologies	2022-04-05	PHASE2
NCT05597735	ACTIVE_NOT_RECRUITING	Monkeypox; Mpox	ANRS, Emerging Infectious Diseases	2023-03-03	PHASE3
NCT06156566	UNKNOWN	Monkeypox	Miquel Ekkelenkamp	2024-08-09	PHASE4
NCT05534165	SUSPENDED	Monkeypox	Marina Klein	2023-08-14	PHASE3
NCT05534984	TERMINATED	MPOX	National Institute of Allergy and Infectious Diseases (NIAID)	2022-09-08	PHASE3
NCT05559099	COMPLETED	Monkeypox	National Institute of Allergy and Infectious Diseases (NIAID)	2022-10-10	PHASE2

Tech Support

Handling Instructions

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