Cat. No.: HY-B0132

Norfloxacin

(Synonyms: MK-0366)

5 Cited Publications

Customer Review

Based on 5 publication(s) in Google Scholar

Norfloxacin (MK-0366) is a broad-spectrum antibiotic that is active against both Gram-positive and Gram-negative bacteria, which functions by inhibiting DNA gyrase.

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

Purity: 98.31%
CAS No.: 70458-96-7
Formula: C₁₆H₁₈FN₃O₃
Molecular Weight:319.33

Storage:

Powder -20°C, 3 years , 4°C, 2 years ; In solvent -80°C, 2 years , -20°C, 1 year

Norfloxacin Chemical Structure

CAS No.: 70458-96-7

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Top Publications Citing

Use of MCE Products

Fluorescent Dye

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

Biological Activity
- Description
- IC₅₀ & Target
- Cellular Effect
- In Vitro
- Clinical Trial
Chemical Information
Publications (5)
Solvent & Solubility
- In Vitro
- In Vivo
Purity & Documentation
References
Help & FAQs
Classifications
Bioz

Biological Activity

Description

Norfloxacin (MK-0366) is a broad-spectrum antibiotic that is active against both Gram-positive and Gram-negative bacteria, which functions by inhibiting DNA gyrase.

IC₅₀ & Target

Quinolone

All Endogenous Metabolite Isoforms :

All Antibiotic Isoforms :

Cellular Effect

Cell Line	Type	Value	Description	References
A-431	IC₅₀	70 μM Compound: Norfloxacin	Inhibition of human A431 cell proliferation by MTT assay Inhibition of human A431 cell proliferation by MTT assay	[PMID: 19595598]
A-431	IC₅₀	137 μM Compound: Norfloxacin	Cytotoxicity against human A431 cells assessed as reduction in cell viability by MTT assay Cytotoxicity against human A431 cells assessed as reduction in cell viability by MTT assay	[PMID: 30660827]
A-431	IC₅₀	>128 μM Compound: NFX	Anticancer activity against human A-431 cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay Anticancer activity against human A-431 cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay	[PMID: 31881454]
A549	IC₅₀	>302 nM Compound: Norfloxacin	Antiproliferative activity against human A549 cells after 72 hrs by MTT assay Antiproliferative activity against human A549 cells after 72 hrs by MTT assay	[PMID: 30660827]
A549	IC₅₀	0.33 mM Compound: NFX	Antitumor activity against human A549 cells assessed as reduction in cell viability incubated for 4 hrs by MTT assay Antitumor activity against human A549 cells assessed as reduction in cell viability incubated for 4 hrs by MTT assay	[PMID: 31881454]
CT26	IC₅₀	0.33 mM Compound: NFX	Antitumor activity against mouse CT26 cells assessed as reduction in cell viability incubated for 4 hrs by MTT assay Antitumor activity against mouse CT26 cells assessed as reduction in cell viability incubated for 4 hrs by MTT assay	[PMID: 31881454]
EJ	IC₅₀	210 μM Compound: Norfloxacin	Inhibition of human EJ cell proliferation by MTT assay Inhibition of human EJ cell proliferation by MTT assay	[PMID: 19595598]
EJ	IC₅₀	137 μM Compound: Norfloxacin	Cytotoxicity against human EJ cells assessed as reduction in cell viability by MTT assay Cytotoxicity against human EJ cells assessed as reduction in cell viability by MTT assay	[PMID: 30660827]
EJ	IC₅₀	>128 μM Compound: NFX	Anticancer activity against human EJ cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay Anticancer activity against human EJ cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay	[PMID: 31881454]
HBL-100	IC₅₀	12.43 μM Compound: N; Nor	Cytotoxicity against human HBL-100 cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay Cytotoxicity against human HBL-100 cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay	[PMID: 34319100]
HeLa	IC₅₀	390 μM Compound: Norfloxacin	Inhibition of human HeLa cell proliferation Inhibition of human HeLa cell proliferation	[PMID: 19595598]
HEp-2	ED₅₀	>20 μg/mL Compound: Norfloxacin	Cytotoxicity against human Hep2 cells after 72 hrs Cytotoxicity against human Hep2 cells after 72 hrs	[PMID: 18500841]
HepG2	IC₅₀	>0.5 mM Compound: NFX, C-H	Cytotoxicity against human HepG2 cells measured after overnight incubation by MTT assay Cytotoxicity against human HepG2 cells measured after overnight incubation by MTT assay	[PMID: 21855181]
HL-60	IC₅₀	>302 nM Compound: Norfloxacin	Antiproliferative activity against human HL60 cells after 72 hrs by MTT assay Antiproliferative activity against human HL60 cells after 72 hrs by MTT assay	[PMID: 30660827]
KB	IC₅₀	150 μM Compound: Norfloxacin	Inhibition of human KB cell proliferation by MTT assay Inhibition of human KB cell proliferation by MTT assay	[PMID: 19595598]
KB	IC₅₀	>128 μM Compound: NFX	Anticancer activity against human KB cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay Anticancer activity against human KB cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay	[PMID: 31881454]
L1210	IC₅₀	>150 μM Compound: NFX	Antiproliferative activity against mouse L1210 cells assessed as reduction in cell viability by MTT assay Antiproliferative activity against mouse L1210 cells assessed as reduction in cell viability by MTT assay	[PMID: 31881454]
L6	IC₅₀	3.4311 μM Compound: Norfloxacin	Cytotoxicity against rat L6 cells assessed as inhibition of cell viability incubated for 24 hrs by MTT assay Cytotoxicity against rat L6 cells assessed as inhibition of cell viability incubated for 24 hrs by MTT assay	[PMID: 32623216]
MCF7	IC₅₀	238 μM Compound: Norfloxacin	Inhibition of human MCF7 cell proliferation by MTT assay Inhibition of human MCF7 cell proliferation by MTT assay	[PMID: 19595598]
MCF7	IC₅₀	13.8 μM Compound: Norfloxacin	Dark toxicity against human MCF7 cells assessed as decrease in cell viability by MTT assay Dark toxicity against human MCF7 cells assessed as decrease in cell viability by MTT assay	[PMID: 29673980]
MCF7	IC₅₀	137 μM Compound: Norfloxacin	Cytotoxicity against human MCF7 cells assessed as reduction in cell viability by MTT assay Cytotoxicity against human MCF7 cells assessed as reduction in cell viability by MTT assay	[PMID: 30660827]
MCF7	IC₅₀	>128 μM Compound: NFX	Anticancer activity against human MCF7 cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay Anticancer activity against human MCF7 cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay	[PMID: 31881454]
MCF7	IC₅₀	19.37 μM Compound: N; Nor	Antitumor activity against human MCF7 cells assessed as cell growth inhibition incubated for 72 hrs by MTT assay Antitumor activity against human MCF7 cells assessed as cell growth inhibition incubated for 72 hrs by MTT assay	[PMID: 34319100]
NCI-H460	IC₅₀	86 μM Compound: Norfloxacin	Inhibition of human NCI-H460 cell proliferation by sulphorodhamine B assay Inhibition of human NCI-H460 cell proliferation by sulphorodhamine B assay	[PMID: 19595598]
NIH3T3	IC₅₀	>1000 μM Compound: Norfloxacin	Inhibition of mouse NIH/3T3 cell proliferation by MTT assay Inhibition of mouse NIH/3T3 cell proliferation by MTT assay	[PMID: 19595598]
PBMC	IC₅₀	>0.5 mM Compound: NFX, C-H	Cytotoxicity against human PBMC measured after overnight incubation by MTT assay Cytotoxicity against human PBMC measured after overnight incubation by MTT assay	[PMID: 21855181]
SH-SY5Y	IC₅₀	>0.5 mM Compound: NFX, C-H	Cytotoxicity against human SH-SY5Y cells measured after overnight incubation by MTT assay Cytotoxicity against human SH-SY5Y cells measured after overnight incubation by MTT assay	[PMID: 21855181]
SK-MEL	IC₅₀	194 μM Compound: Norfloxacin	Inhibition of human SK-MEL cell proliferation by MTT assay Inhibition of human SK-MEL cell proliferation by MTT assay	[PMID: 19595598]
SK-MEL3	IC₅₀	137 μM Compound: Norfloxacin	Cytotoxicity against human SK-MEL-3 cells assessed as reduction in cell viability by MTT assay Cytotoxicity against human SK-MEL-3 cells assessed as reduction in cell viability by MTT assay	[PMID: 30660827]
SK-MEL3	IC₅₀	>128 μM Compound: NFX	Anticancer activity against human SK-MEL3 cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay Anticancer activity against human SK-MEL3 cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay	[PMID: 31881454]
SW480	IC₅₀	168 μM Compound: Norfloxacin	Inhibition of human SW480 cell proliferation by MTT assay Inhibition of human SW480 cell proliferation by MTT assay	[PMID: 19595598]
SW480	IC₅₀	137 μM Compound: Norfloxacin	Cytotoxicity against human SW480 cells assessed as reduction in cell viability by MTT assay Cytotoxicity against human SW480 cells assessed as reduction in cell viability by MTT assay	[PMID: 30660827]
SW480	IC₅₀	>128 μM Compound: NFX	Anticancer activity against human SW480 cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay Anticancer activity against human SW480 cells assessed as reduction in cell viability incubated for 72 hrs by MTT assay	[PMID: 31881454]
V79	IC₅₀	>500 μg/mL Compound: 1 Norfloxacin	Mammalian cell cytotoxicity test in chinese hamster V79 cells (clonogenic cytotoxicity) Mammalian cell cytotoxicity test in chinese hamster V79 cells (clonogenic cytotoxicity)	[PMID: 1469702]

In Vitro

Norfloxacin (MK-0366) is a synthetic chemotherapeutic antibacterial agent occasionally used to treat common as well as complicated urinary tract infections. Norfloxacin (MK-0366) is a broad-spectrum antibiotic that is active against both Gram-positive and Gram-negative bacteria. It functions by inhibiting DNA gyrase, a type II topoisomerase, and topoisomerase IV, enzymes necessary to separate bacterial DNA, thereby inhibiting cell division.There are currently three approved uses in the adult population (one of which is restricted) and the other ineffective due to bacterial resistance.

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

Clinical Trial

NCT Number	Sponsor	Condition	Start Date	Phase A549
NCT01329991	Plexxikon\|		2011-05	PHASE1

Chemical Information

CAS No. 70458-96-7
Appearance Solid
Molecular Weight 319.33
Formula C₁₆H₁₈FN₃O₃
Color White to light yellow
SMILES

O=C(C1=CN(CC)C2=C(C=C(F)C(N3CCNCC3)=C2)C1=O)O
Synonyms

MK-0366
Structure Classification
- Ketones, Aldehydes, Acids
Initial Source
- Endogenous metabolite
Shipping

Room temperature in continental US; may vary elsewhere.

Storage

Powder	-20°C	3 years
	4°C	2 years
In solvent	-80°C	2 years
	-20°C	1 year

Publications (5)

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Journal Impact Factor

Nat Commun

Antimicrobial resistance and population genomics of multidrug-resistant Escherichia coli in pig farms in mainland China. [Abstract]

2022 Mar 2;13(1):1116. PMID: 35236849
Theranostics

Antibiotic Azithromycin inhibits brown/beige fat functionality and promotes obesity in human and rodents. [Abstract]

2022 Jan 1;12(3):1187-1203. PMID: 35154482
Water Res

Quantifying community-wide antibiotic usage via urban water fingerprinting: Focus on contrasting resource settings in South Africa. [Abstract]

2023 Jul 15:240:120110. PMID: 37247434
Food Chem X

Machine learning prioritization of antibiotic residues in aquatic foods reveals exposure-driven genotoxic risk mediated by BCL2. [Abstract]

2026 Feb 8:34:103646. PMID: 41756597
J Environ Qual

Competitive and synergistic sorption of norfloxacin and bisphenol A onto two different microplastics. [Abstract]

2025 Oct 21. PMID: 41117009

Solvent & Solubility

In Vitro:

DMSO : 5 mg/mL (15.66 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

3.1316 mL

15.6578 mL

31.3156 mL

5 mM

0.6263 mL

3.1316 mL

6.2631 mL

10 mM

0.3132 mL

1.5658 mL

3.1316 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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

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)

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Volume _(start) Volume _(start)

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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 40% PEG300 5% Tween-80 45% Saline

Solubility: ≥ 0.5 mg/mL (1.57 mM); Clear solution

This protocol yields a clear solution of ≥ 0.5 mg/mL (saturation unknown).

Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (5.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

Protocol 2

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

Solubility: ≥ 0.5 mg/mL (1.57 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 (273 KB)
SDS (393 KB)
- English - EN (393 KB)
- Français - FR (393 KB)
- Deutsch - DE (393 KB)
- Norwegian - NO (393 KB)
- Español - ES (393 KB)
- Swedish - SV (393 KB)
- Italian - IT (393 KB)
- Korean - KR (393 KB)
- Portuguese - PT (393 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]. Nelson JM, et al. Fluoroquinolone-resistant Campylobacter species and the withdrawal of fluoroquinolones from use in poultry: a public health success story. Clin Infect Dis. 2007 Apr 1;44(7):977-80. Epub 2007 Feb 14. [Content Brief]

[2]. Pade?skaia EN. Norfloxacin: more than 20 years of clinical use, the results and place among fluoroquinolones in modern chemotherapy for infections. Antibiot Khimioter. 2003;48(9):28-36. [Content Brief]

[3]. Rafalsky V, et al. Quinolones for uncomplicated acute cystitis in women. Cochrane Database Syst Rev. 2006 Jul 19;(3):CD003597. [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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

Optional Solvent	Concentration Solvent Mass	1 mg	5 mg	10 mg	25 mg
DMSO	1 mM	3.1316 mL	15.6578 mL	31.3156 mL	78.2889 mL
	5 mM	0.6263 mL	3.1316 mL	6.2631 mL	15.6578 mL
	10 mM	0.3132 mL	1.5658 mL	3.1316 mL	7.8289 mL
	15 mM	0.2088 mL	1.0439 mL	2.0877 mL	5.2193 mL

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Norfloxacin

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Publications Citing Use of MedChemExpress (MCE) Norfloxacin

All Endogenous Metabolite Isoforms

All Antibiotic Isoforms

Biological Activity

Chemical Information

Publications (5)

Solvent & Solubility

Purity & Documentation

References

Help & FAQs

Complete Stock Solution Preparation Table

Norfloxacin

Anti-Infection Compound Library

FDA-Approved Drug Library

Drug Repurposing Compound Library

Antibacterial Compound Library

Anti-COVID-19 Compound Library

NMPA-Approved Drug Library

FDA Approved & Pharmacopeial Drug Library

Antibiotics Library

Drug-Induced Liver Injury (DILI) Compound Library

Human Metabolite Library

Off-patent Drug Library

Bioactive Compound Library Max

MCE Bioactive Compound Library

Drug Repurposing Compound Library Plus

FDA-Approved Drug Library Plus

FDA-Approved Drug Library Mini

Bioactive Compound Library

RO5 Drug-like Natural Product Library

High-Throughput Bioactive Compound Library

Mass Spectrometry Human Metabolite Library

Nephrotoxicity Compound Library

Natural Product Diversity Scaffold Library

Publications Citing Use of MedChemExpress (MCE) Norfloxacin

All Endogenous Metabolite Isoforms

All Antibiotic Isoforms

Biological Activity

Chemical Information

Publications (5)

Solvent & Solubility

Purity & Documentation

References

Help & FAQs

Complete Stock Solution Preparation Table

Norfloxacin Related Classifications

HY-B0132 Related Classifications