Oxacillin sodium monohydrate

For research use only.

Catalog No.S2563 Synonyms: Methicillin

Oxacillin sodium monohydrate Chemical Structure

CAS No. 7240-38-2

Oxacillin sodium monohydrate (Methicillin) is an antibacterial agent and is a narrow spectrum beta-lactam antibiotic of the penicillin class.

Purity & Quality Control

Choose Selective Bacterial Inhibitors

Biological Activity

Description Oxacillin sodium monohydrate (Methicillin) is an antibacterial agent and is a narrow spectrum beta-lactam antibiotic of the penicillin class.



Solubility (25°C)

In vitro Water 88 mg/mL (199.35 mM)
DMSO 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 441.43


CAS No. 7240-38-2
Storage powder
in solvent
Synonyms Methicillin
Smiles CC1=C(C(=NO1)C2=CC=CC=C2)C(=O)NC3C4N(C3=O)C(C(S4)(C)C)C(=O)[O-].O.[Na+]

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)
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Step 2: Enter the in vivo formulation ()
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Bio Calculators

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 SDS / 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 SDS / COA (available online).

The Serial Dilution Calculator Equation

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  • Computed Result

  • C1=C0/X C1: LOG(C1):
    C2=C1/X C2: LOG(C2):
    C3=C2/X C3: LOG(C3):
    C4=C3/X C4: LOG(C4):
    C5=C4/X C5: LOG(C5):
    C6=C5/X C6: LOG(C6):
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    C8=C7/X C8: LOG(C8):
Molecular Weight Calculator

Molecular Weight Calculator

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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
NCT04597424 Recruiting Drug: Experimental: doxycycline|Biological: Bexsero® vaccine Unsafe Sex|Risk-Taking ANRS Emerging Infectious Diseases January 19 2021 Phase 3
NCT04160468 Recruiting Drug: Exebacase|Drug: Placebo Staphylococcus Aureus Bacteremia|Staphylococcus Aureus Endocarditis ContraFect December 20 2019 Phase 3
NCT03643952 Completed Drug: Daptomycin for Injection Bacteremia|Soft Tissue Infections|Skin Diseases Infectious Merck Sharp & Dohme Corp. December 6 2018 Phase 2
NCT03248063 Recruiting Drug: Cloxacillin|Drug: Cefazolin Bacteremia Due to Methicillin Susceptible Staphylococcus Aureus Assistance Publique - Hôpitaux de Paris September 5 2018 Not Applicable

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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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID