2. Anti-infection
  3. Orthopoxvirus Arenavirus
  4. Tecovirimat monohydrate

Tecovirimat monohydrate  (Synonyms: ST-246 monohydrate)

Cat. No.: HY-14805A Purity: 97.35%
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Tecovirimat (ST-246) monohydrate is the monohydrate form of Tecovirimat (HY-14805). Tecovirimat monohydrate is an orally bioavailable and selective compound against orthopoxviruses [including vaccinia, monkeypox, camelpox, cowpox, ectromelia (mousepox), smallpox and variola viruses]. Tecovirimat monohydrate is evaluated against vaccinia, cowpox virus, ectromelia virus with EC50 values of 0.01 μM, 0.48 μM and 0.05 μM, respectively. Tecovirimat monohydrate targets the orthopoxvirus protein VP37 which is necessary for membrane envelopment of intracellular mature virus particles to form enveloped virus. Tecovirimat monohydrate exerts antiviral activity on the target of the cowpox virus V061 gene, which is homologous to vaccinia virus F13L, encoding a major envelope protein (p37) required for production of extracellular virus. Tecovirimat monohydrate could be used in the study for orthopoxvirus-induced diseases.

For research use only. We do not sell to patients.

CAS No. : 1162664-19-8

Size Price Stock Quantity
Solid + Solvent (Highly Recommended)
10 mM * 1 mL in DMSO
ready for reconstitution
 In-stock
Solution
10 mM * 1 mL in DMSO In-stock
Solid
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10 mg In-stock
25 mg In-stock
50 mg In-stock
100 mg In-stock
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Customer Review

Based on 1 publication(s) in Google Scholar

Other Forms of Tecovirimat monohydrate:

Tecovirimat monohydrate Related Antibodies

Top Publications Citing Use of Products

1 Publications Citing Use of MCE Tecovirimat monohydrate

Microbiological Assay

    Tecovirimat monohydrate purchased from MedChemExpress. Usage Cited in: Biosaf Health. 2025 Jan 5.

    Inhibition of EEV by ST-246 (Tecovirimat). HeLa cells were infected with VACV WR at a MOI of 3 for 2 h and then added increased dosages of ST-246 for another 22 h. The EEV was collected and titrated by BSC-1 cells.

    • Biological Activity

    • Purity & Documentation

    • References

    • Customer Review

    Description

    Tecovirimat (ST-246) monohydrate is the monohydrate form of Tecovirimat (HY-14805). Tecovirimat monohydrate is an orally bioavailable and selective compound against orthopoxviruses [including vaccinia, monkeypox, camelpox, cowpox, ectromelia (mousepox), smallpox and variola viruses]. Tecovirimat monohydrate is evaluated against vaccinia, cowpox virus, ectromelia virus with EC50 values of 0.01 μM, 0.48 μM and 0.05 μM, respectively. Tecovirimat monohydrate targets the orthopoxvirus protein VP37 which is necessary for membrane envelopment of intracellular mature virus particles to form enveloped virus. Tecovirimat monohydrate exerts antiviral activity on the target of the cowpox virus V061 gene, which is homologous to vaccinia virus F13L, encoding a major envelope protein (p37) required for production of extracellular virus. Tecovirimat monohydrate could be used in the study for orthopoxvirus-induced diseases[1][2][3][4][5].
    In Vitro

    Tecovirimat monohydrate (0-50 μM, 3 days) is a potent and specific inhibitor of orthopoxvirus replication that is active against a broad spectrum of orthopoxviruses[1].

    MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

    Tecovirimat monohydrate Related Antibodies

    Cell Cytotoxicity Assay[1]

    Cell Line: Vero cells
    Concentration: 0-50 μM
    Incubation Time: 3 days
    Result: Was more potent relative to Cidofovir (CDV) (HY-17438) after vaccinia virus strain NYCBH infection in cytopathic effect (CPE)-based assays in vero cells.
    In Vivo

    Tecovirimat monohydrate (50 mg/kg, oral gavage, twice a day for 14 days) mounts a protective immune response to vaccinia virus infection in a lethal intranasal vaccinia virus challenge model of mice[1].
    Tecovirimat monohydrate (50 mg/kg, oral gavage, 5 days) can inhibit vaccinia virus-induced lesion formation following i.v. viral inoculation in Vaccinia virus-mouse tail lesion model[1].
    Tecovirimat monohydrate (100 mg/kg, p.o., daily for various durations of 5, 7, 10, or 14 days) significantly decreases in mortality of cowpox virus (CV)-infected mice[2].

    Pharmacokinetic parameters of ST-246 in mice[1]

    Dosage (mg/kg) Tmax (h) Cmax (μg/mL) AUC0-t (μg·h/mL) T1/2 (h)
    30 2.7 32.5 284.2 2.5
    100 1.0 62.2 287.6 2.5

    MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

    Animal Model: Weanling BALB/c mice challenged with vaccinia virus strain(4 to 6 weeks of age and weighing 15 to 20 g)[1]
    Dosage: 50 mg/kg
    Administration: oral gavage, twice a day for 14 days
    Result: Tecovirimat monohydrate-treated mice mounted a protective immune response to vaccinia virus infection in a lethal intranasal vaccinia virus challenge model.
    Animal Model: NMRI mice inoculated via the tail vein with vaccinia virus(4 to 6 weeks of age and weighing 15 to 20 g)[1]
    Dosage: 50 mg/kg
    Administration: oral gavage, 5 days
    Result: Showed a dose-dependent reduction in the numbers of tail lesions at day 8 postinfection relative to placebo-treated control animals in mice.
    Clinical Trial
    Molecular Weight

    394.34

    Formula

    C19H17F3N2O4
    CAS No.
    Appearance

    Solid

    Color

    White to off-white

    SMILES

    O=C(NN(C([C@]1([H])[C@@]2([H])[C@@](C3)([H])[C@@]3([H])[C@@](C=C2)([H])[C@]41[H])=O)C4=O)C5=CC=C(C(F)(F)F)C=C5.O
    Shipping

    Room temperature in continental US; may vary elsewhere.
    Storage

    4°C, sealed storage, away from moisture

    *In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

    Solvent & Solubility
    In Vitro: 

    DMSO : 100 mg/mL (253.59 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

    Preparing
    Stock Solutions
    Concentration Solvent Mass 1 mg 5 mg 10 mg
    1 mM 2.5359 mL 12.6794 mL 25.3588 mL
    5 mM 0.5072 mL 2.5359 mL 5.0718 mL
    View the Complete Stock Solution Preparation Table

    * Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
    Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

    • Molarity Calculator

    • Dilution Calculator

    Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

    Mass
    =
    Concentration
    ×
    Volume
    ×
    Molecular Weight *

    Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

    This equation is commonly abbreviated as: C1V1 = C2V2

    Concentration (start)

    C1

    ×
    Volume (start)

    V1

    =
    Concentration (final)

    C2

    ×
    Volume (final)

    V2

    In Vivo:

    Select the appropriate dissolution method based on your experimental animal and administration route.

    For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
    To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
    The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

    • Protocol 1

      Add each solvent one by one:  10% DMSO    90% Corn Oil

      Solubility: ≥ 2.5 mg/mL (6.34 mM); Clear solution

      This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.

      Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL Corn oil, and mix evenly.

    In Vivo Dissolution Calculator
    Please enter the basic information of animal experiments:

    Dosage

    mg/kg

    Animal weight
    (per animal)

    g

    Dosing volume
    (per animal)

    μL

    Number of animals

    Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
    Please enter your animal formula composition:
    %
    DMSO +
    % 
    +
    %
    Tween-80 +
    %
    Saline
    Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
    The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
    Calculation results:
    Working solution concentration: mg/mL
    Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).

    *In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

    The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
    Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
     If the continuous dosing period exceeds half a month, please choose this protocol carefully.
    Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
    Purity & Documentation
    References

    Complete Stock Solution Preparation Table

    * Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
    Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

    Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
    DMSO 1 mM 2.5359 mL 12.6794 mL 25.3588 mL 63.3971 mL
    5 mM 0.5072 mL 2.5359 mL 5.0718 mL 12.6794 mL
    10 mM 0.2536 mL 1.2679 mL 2.5359 mL 6.3397 mL
    15 mM 0.1691 mL 0.8453 mL 1.6906 mL 4.2265 mL
    20 mM 0.1268 mL 0.6340 mL 1.2679 mL 3.1699 mL
    25 mM 0.1014 mL 0.5072 mL 1.0144 mL 2.5359 mL
    30 mM 0.0845 mL 0.4226 mL 0.8453 mL 2.1132 mL
    40 mM 0.0634 mL 0.3170 mL 0.6340 mL 1.5849 mL
    50 mM 0.0507 mL 0.2536 mL 0.5072 mL 1.2679 mL
    60 mM 0.0423 mL 0.2113 mL 0.4226 mL 1.0566 mL
    80 mM 0.0317 mL 0.1585 mL 0.3170 mL 0.7925 mL
    100 mM 0.0254 mL 0.1268 mL 0.2536 mL 0.6340 mL
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    Tecovirimat monohydrate Related Classifications

    Help & FAQs
    • Do most proteins show cross-species activity?

      Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

    Keywords:

    Tecovirimat1162664-19-8ST-246ST246ST 246OrthopoxvirusArenavirusorthopoxvirusesVP37antiviral activityF13Lorthopoxvirus-induced diseasesvero cellsInhibitorinhibitorinhibit

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