Cat. No.: HY-B0398

Nalidixic acid

2 Cited Publications

Customer Review

Based on 2 publication(s) in Google Scholar

Nalidixic acid, a quinolone antibiotic, is effective against both gram-positive and gram-negative bacteria. Nalidixic acid acts in a bacteriostatic manner in lower concentrations and is bactericidal in higher concentrations. Nalidixic acid inhibits a subunit of DNA gyrase and topoisomerase IV and reversibly blocks DNA replication in susceptible bacteria.

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

Purity: 99.97%
CAS No.: 389-08-2
Formula: C₁₂H₁₂N₂O₃
Molecular Weight:232.24

Storage:

Powder -20°C, 3 years , 4°C, 2 years ; In solvent -80°C, 6 months , -20°C, 1 month

Nalidixic acid Chemical Structure

CAS No.: 389-08-2

Size

Price

Stock

Quantity

Amount: USD 0.00

* Please select Quantity before adding items.

Top Publications Citing

Use of MCE Products

Fluorescent Dye

Strong Fluorescence Signal / Multi-Disciplinary Applications / High Fluorescence Specificity

Biological Activity
- Description
- IC₅₀ & Target
- In Vitro
- In Vivo
Chemical Information
Publications (2)
Solvent & Solubility
- In Vitro
- In Vivo
Purity & Documentation
References
Help & FAQs
Classifications
Bioz

Biological Activity

Description

IC₅₀ & Target^[1]

Quinolone

Topoisomerase

All Antibiotic Isoforms :

All Topoisomerase Isoforms :

In Vitro

Nalidixic acid is against a variety of microorganisms, it is against with Escherichia coli, Pasteurella spp., Klebsiella pneuiiioniae, Aerobacter aeroyenes, Proteus spp., Salmonella spp., Shigella spp. and Brucella spp. with MIC values of 5.0-12.5 μg/ml, 0.5-2.5 μg/ml, 0.8-25.0 μg/ml, 1.0-25.0 μg/ml, 1.25-30.0 μg/ml, 8-3.2 μg/ml, and 7.5-10.0 μg/ml, respectively^[1].

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

In Vivo

The in vivo activity of Nalidixic acid is most pronounced against Gram-negative bacteria, while Gram-positive organisms are generally more resistant. Maximal activity is observed against systemic infections caused by E. coli, A. aerobacter, Proteus mirabilis, Shigella fkxneri, the ED₅₀ values are 25 mg/kg, 60 mg/kg, 50 mg/kg, and 62 mg/kg, respectively^[1].
The acute toxicity (LD₅₀) of Nalidixic acid in mice following oral and parenteral administration is: oral, 3300 mg/kg; intravenous, 176 mg/kg, and subcutaneous, 500 mg/kg^[1].

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

Chemical Information

CAS No. 389-08-2
Appearance Solid
Molecular Weight 232.24
Formula C₁₂H₁₂N₂O₃
Color White to light yellow
SMILES

O=C(C1=CN(CC)C2=C(C=CC(C)=N2)C1=O)O
Structure Classification
- Antibiotics
- Other Antibiotics
- Antibiotics
- Resistance Selection
Initial Source
- Microorganisms
Streptomyces sp.
Shipping

Room temperature in continental US; may vary elsewhere.

Storage

Powder	-20°C	3 years
	4°C	2 years
In solvent	-80°C	6 months
	-20°C	1 month

Publications (2)

All

Sort by:

Journal Impact Factor

Nature

Lithocholic acid phenocopies anti-ageing effects of calorie restriction. [Abstract]

2025 Jul;643(8070):192-200. PMID: 39695227
J Biol Chem

Mitochondrial pyruvate carrier inhibitors improve metabolic parameters in diet-induced obese mice. [Abstract]

2022 Feb;298(2):101554. PMID: 34973337

Solvent & Solubility

In Vitro:

0.1 M NaOH : 10 mg/mL (43.06 mM; Need ultrasonic)

DMSO : 6 mg/mL (25.84 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

H₂O : < 0.1 mg/mL (insoluble)

View the Complete Stock Solution Preparation Table

Preparing Stock Solutions

View the Complete Stock Solution Preparation Table

Concentration Solvent Mass

1 mg

5 mg

10 mg

Concentration

Solvent

Mass

1 mM

4.3059 mL

21.5295 mL

43.0589 mL

5 mM

0.8612 mL

4.3059 mL

8.6118 mL

10 mM

0.4306 mL

2.1529 mL

4.3059 mL

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. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Molarity Calculator

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

Mass Mass

Concentration Concentration

Volume Volume

Molecular Weight Molecular Weight

Dilution Calculator

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

Concentration _(start) Concentration _(start)

Volume _(start) Volume _(start)

Concentration _(final) Concentration _(final)

Volume _(final) Volume _(final)

In Vivo:

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

Stock Solution Working Solution

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: ≥ 0.5 mg/mL (2.15 mM); Clear solution

This protocol yields a clear solution of ≥ 0.5 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 (5.0 mg/mL) to 900 μL Corn oil, and mix evenly.

In Vivo Dissolution Calculator

Please enter the basic information of animal experiments:

Dosage Dosage
mg/kg
Animal Weight (Per Animal) Animal Weight (Per Animal)
g
Dosing Volume (Per Animal) Dosing Volume (Per Animal)
μL
Number of Animals Number of Animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.

Please enter your animal formula composition:

%
DMSO +

Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
%
+
+
%
Tween-80 + +
%
Saline +

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).

Working solution concentration: 0.22 mg/mL

Purity & Documentation

Select Batch:

Purity: 99.98%

Assay: 99.98%

ee.: 99.98%

Data Sheet (274 KB)
SDS (418 KB)
- English - EN (418 KB)
- Français - FR (418 KB)
- Deutsch - DE (418 KB)
- Norwegian - NO (418 KB)
- Español - ES (418 KB)
- Swedish - SV (418 KB)
- Italian - IT (418 KB)
- Korean - KR (418 KB)
- Portuguese - PT (418 KB)
COA (2659 KB)
Elemental Analysis Report (2659 KB)
HNMR (2659 KB)
CNMR (2659 KB)
RP-HPLC (2659 KB)
NP-HPLC (2659 KB)
MS (2659 KB)
LCMS (2659 KB)
IR (2659 KB)
GC (2659 KB)
OR (2659 KB)
SDS-PAGE (2659 KB)
SEC-HPLC (2659 KB)
Other Report (2659 KB)
Handling Instructions (2659 KB)

References

[1]. antibiotic, DNA gyrase, susceptible bacteria, Escherichia coli, Klebsiella pneuiiioniae, Aerobacter aeroyenes, Proteus spp, Salmonella spp. [Content Brief]

[2]. Anna Fàbrega, et al. Mechanism of Action of and Resistance to Quinolones. Microb Biotechnol [Content Brief]

Help & FAQs

How should lyophilized recombinant proteins be reconstituted and stored?

1. Before opening the cap, centrifuge the vial at 13000 rpm for 20-30 seconds. This step will ensure that any lyophilized powder that may have adhered to the cap or walls is collected at the bottom of the vial, minimizing the risk of product loss.

Complete Stock Solution Preparation Table

Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. 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 / 0.1 M NaOH	1 mM	4.3059 mL	21.5295 mL	43.0589 mL	107.6473 mL
	5 mM	0.8612 mL	4.3059 mL	8.6118 mL	21.5295 mL
	10 mM	0.4306 mL	2.1529 mL	4.3059 mL	10.7647 mL
	15 mM	0.2871 mL	1.4353 mL	2.8706 mL	7.1765 mL
	20 mM	0.2153 mL	1.0765 mL	2.1529 mL	5.3824 mL
	25 mM	0.1722 mL	0.8612 mL	1.7224 mL	4.3059 mL
0.1 M NaOH	30 mM	0.1435 mL	0.7176 mL	1.4353 mL	3.5882 mL
0.1 M NaOH	40 mM	0.1076 mL	0.5382 mL	1.0765 mL	2.6912 mL

Keywords

Nalidixic acid

2 Cited Publications

100 mg Get Quote

Subscribe to the

MedChemExpress

Newsletter

Product Name:
Cat. No.:
Quantity:
MCE Japan Authorized Agent:

Product Name:
CAS No.:
Species:
Purity:
Quantity:

Nalidixic acid

Anti-Infection Compound Library

Cell Cycle/DNA Damage Compound Library

Natural Product Library

FDA-Approved Drug Library

Anti-Aging Compound Library

Drug Repurposing Compound Library

Antibacterial Compound Library

Anti-COVID-19 Compound Library

NMPA-Approved Drug Library

Traditional Chinese Medicine Active Compound Library

FDA Approved & Pharmacopeial Drug Library

Antibiotics Library

Anti-Lung Cancer Compound Library

Drug-Induced Liver Injury (DILI) Compound Library

Microbial Metabolite Library

Tumorigenesis-Related Compound Library

Human Metabolite Library

Heterocyclic Compound Library

Off-patent Drug Library

Highly Selective Inhibitors Library

FDA-Approved Traditional Chinese Medicine Active Compound Library

Multi-Target Compound Library

Bioactive Compound Library Max

MCE Bioactive Compound Library

Natural Product Library Plus

Drug Repurposing Compound Library Plus

FDA-Approved Drug Library Plus

FDA-Approved Drug Library Mini

Natural Product and Natural Product-Like Compound Library

Bioactive Compound Library

Protein Kinase Compound Library

RO5 Drug-like Natural Product Library

High-Throughput Bioactive Compound Library

High-Throughput Natural Product Library

Ancient Chinese Classical Formulas Traditional Chinese Medicine Active Compound Library

Mass Spectrometry Human Metabolite Library

Natural Product Diversity Scaffold Library

Mass Spectrometry Natural Product Library

Publications Citing Use of MedChemExpress (MCE) Nalidixic acid

All Antibiotic Isoforms

All Topoisomerase Isoforms

Biological Activity

Chemical Information

Publications (2)

Solvent & Solubility

Purity & Documentation

References

Help & FAQs

Complete Stock Solution Preparation Table

Nalidixic acid Related Classifications

Cat. No.: HY-B0398