For research use only.

Catalog No.S1211 Synonyms: R-837, S-26308

2 publications

Imiquimod Chemical Structure

Molecular Weight(MW): 240.3

Imiquimod (R-837, S-26308) is a novel synthetic agent with immune response modifying activity.

Size Price Stock Quantity  
10mM (1mL in DMSO) EUR 186 In stock
EUR 65 In stock
EUR 95 In stock
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Biological Activity

Description Imiquimod (R-837, S-26308) is a novel synthetic agent with immune response modifying activity.



Solubility (25°C)

In vitro DMSO 1 mg/mL warmed (4.16 mM)
Water Insoluble
Ethanol Insoluble

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 240.3


CAS No. 99011-02-6
Storage powder
in solvent
Synonyms R-837, S-26308
Smiles CC(C)CN1C=NC2=C1C3=CC=CC=C3N=C2N

In vivo Formulation Calculator (Clear solution)

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Molarity Calculator

Molarity Calculator

Calculate the mass, volume or concentration required for a solution. The Selleck molarity calculator is based on the following equation:

Mass (mg) = Concentration (mM) × Volume (mL) × Molecular Weight (g/mol)

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*When preparing stock solutions, please always use the batch-specific molecular weight of the product found on the via label and MSDS / COA (available on product pages).

Dilution Calculator

Dilution Calculator

Calculate the dilution required to prepare a stock solution. The Selleck dilution calculator is based on the following equation:

Concentration (start) x Volume (start) = Concentration (final) x Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2 ( Input Output )

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* When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and MSDS / COA (available online).

The Serial Dilution Calculator Equation

  • Serial Dilutions

  • Computed Result

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    C2=C1/X C2: LOG(C2):
    C3=C2/X C3: LOG(C3):
    C4=C3/X C4: LOG(C4):
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Molecular Weight Calculator

Molecular Weight Calculator

Enter the chemical formula of a compound to calculate its molar mass and elemental composition:

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Instructions to calculate molar mass (molecular weight) of a chemical compound:

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Definitions of molecular mass, molecular weight, molar mass and molar weight:

Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.

Molarity Calculator

Mass Concentration Volume Molecular Weight

Clinical Trial Information

NCT Number Recruitment interventions Conditions Sponsor/Collaborators Start Date Phases
NCT02301494 Not yet recruiting Drug: 3.75% Imiquimod Cream|Drug: 0.1% Fluocinonide Cream Mycosis Fungoides Rochester General Hospital|Bausch Health Americas Inc.|Rochester Skin Lymphoma Medical Group PLLC April 2020 Not Applicable
NCT03196180 Active not recruiting Drug: Imiquimod|Drug: Topical Fluorouracil Cervical Intraepithelial Neoplasia Grade 2/3|Cervical Squamous Cell Carcinoma In Situ|Cervical Squamous Intraepithelial Neoplasia 2|High Grade Cervical Intraepithelial Neoplasia National Cancer Institute (NCI) September 30 2019 Early Phase 1
NCT03233412 Active not recruiting Procedure: Control|Drug: Imiquimod High Grade Intraepithelial Neoplasia|Cervix Cancer Barretos Cancer Hospital|Farmoquimica S.A. January 1 2018 Phase 2
NCT03057340 Not yet recruiting Biological: Dribble vaccine Carcinoma Non-Small-Cell Lung Second Affiliated Hospital School of Medicine Zhejiang University June 1 2017 Phase 1
NCT02454634 Completed Drug: IDH1 peptide vaccine Glioma National Center for Tumor Diseases Heidelberg|University Hospital Heidelberg|German Cancer Research Center|Neuro-Oncology Working Group of the German Cancer Society June 2015 Phase 1

Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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