For research use only.

Catalog No.S4210

Benzocaine Chemical Structure

Molecular Weight(MW): 165.19

Benzocaine is the ethyl ester of p-aminobenzoic acid (PABA), it is a local anesthetic commonly used as a topical pain reliever or in cough drops.

Size Price Stock Quantity  
USD 97 In stock
Bulk Discount

Free Overnight Delivery on orders over $ 500
Next day delivery by 10:00 a.m. Order now.

Purity & Quality Control

Choose Selective Sodium Channel Inhibitors

Biological Activity

Description Benzocaine is the ethyl ester of p-aminobenzoic acid (PABA), it is a local anesthetic commonly used as a topical pain reliever or in cough drops.
Sodium channel [1]
In vitro

Benzocaine blocks µ1 wild-type Na+ currents in a dose-dependent manner with IC50 of 0.8 mM in HEK293T cells. Benzocaine (1 mM) blocks about 55% of wild-type Na+ current but about 95% of µ1-N1584A mutant current. Benzocaine (1 mM) blocks about 55% of wild-type µ1 currents, but about 80% of µ1-I1575A mutant current. [1] Benzocaine results in a biphasic (protective/inductive) concentration-dependent hemolytic effect upon rat erythrocytes, with an effective Benzocaine:lipid molar ratio in the membrane for protection (RePROT), onset of hemolysis (ReSAT) and 100% membrane solubilization (ReSOL) of 1.0:1, 1.1:1 and 1.3:1, respectively. [2] Benzocaine and 4-hydroxybenzoate interact with the open and inactivated channels during repetitive pulses, but during the interpulse the complex dissociates too fast to accumulate sufficient use-dependent block of Na+ currents. [3] Benzocaine (500 μM) reduces the peak and steady-state currents and increases the amplitude of the inactivating component from 21.7% to 30.2% (n=7, P<0.05), so that benzocaine-induced block at the end of pulses to +60 mV averaged 30.9% (n=7). Benzocaine (500 μM) significantly accelerates the initial phase of deactivation (τf=27.2±2.6 ms, n=7, P<0.01), but does not modify the slow phase of tail current decline. Benzocaine binds with high affinity to an intracellular binding site to produce 'agonist' effects and to a low affinity subsite, which is also located in the inner mouth, to produce the blocking effects. Benzocaine and extracellular K(+) interact to modify the voltage-dependence of channel opening. [4]

In vivo Benzocaine is absorbed rapidly and similarly through both viable and nonviable skin of the hairless guinea pig, the absorption of the two acidic compounds, benzoic acid and PABA, is greater through nonviable skin. [5]


Solubility (25°C)

In vitro DMSO 33 mg/mL (199.76 mM)
Ethanol 33 mg/mL (199.76 mM)
Water 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 165.19


CAS No. 94-09-7
Storage powder
in solvent
Synonyms N/A
Smiles CCOC(=O)C1=CC=C(N)C=C1

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 ul Number of animals
Step 2: Enter the in vivo formulation (Different batches have different solubility ratios, please contact Selleck to provide you with the correct ratio)
% DMSO % % Tween 80 % ddH2O

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)

  • Mass
    Molecular Weight

*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 )

  • C1

* 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

  • 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):
    C7=C6/X C7: LOG(C7):
    C8=C7/X C8: LOG(C8):
Molecular Weight Calculator

Molecular Weight Calculator

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

Total Molecular Weight: g/mol

Tip: Chemical formula is case sensitive. C10H16N2O2 c10h16n2o2

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

To calculate molar mass of a chemical compound, please enter its chemical formula and click 'Calculate'.

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

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

Tel: +1-832-582-8158 Ext:3

If you have any other enquiries, please leave a message.

  • * Indicates a Required Field

Sodium Channel Signaling Pathway Map

Related Sodium Channel Products

Tags: buy Benzocaine | Benzocaine ic50 | Benzocaine price | Benzocaine cost | Benzocaine solubility dmso | Benzocaine purchase | Benzocaine manufacturer | Benzocaine research buy | Benzocaine order | Benzocaine mouse | Benzocaine chemical structure | Benzocaine mw | Benzocaine molecular weight | Benzocaine datasheet | Benzocaine supplier | Benzocaine in vitro | Benzocaine cell line | Benzocaine concentration | Benzocaine nmr
Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID