Norfloxacin, pale yellow powder

Supplier: MP Biomedicals

Synonyms: 1-Ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinolinecarboxylic Acid

0215594905 0215594925
ICNA0215594905EA 166 SGD
ICNA0215594905 ICNA0215594925
Norfloxacin, pale yellow powder
Norfloxacin

A synthetic fluoroquinolone antibiotic used to treat urinary tract infections. It is effective against gram-positive and gram-negative bacteria, and its’ mode of action is to inhibit DNA gyrase and topoisomerase IV, thus
preventing cell division.


Norfloxacin blocks DNA replication by interfering with an ATP-induced structural transition of DNA complexed with DNA gyrase (topoisomerase). Mode of action: inhibits bacterial DNA replication. Antimicrobial spectrum: Gram-negative bacteria; less effective against Gram-positive bacteria.


Soluble in glacial acetic acid (50 mg/ml - clear, yellow-green solution). Soluble in octyl alchol (5 mg/ml), chloroform (5,5 mg/ml), acetone (5,1 mg/ml); slightly soluble in water (0,28 mg/ml - solubility in water is pH dependent, increasing sharply at pH < 5 or at pH > 10), methanol (0,98 mg/ml), ethanol (1,9 mg/ml) or ethyl acetate (0,94 mg/ml).

Formula: C₁₆H₁₈FN₃O₃
MW: 319,34 g/mol
Melting Pt: 227…228 °C
Storage Temperature: Refrigerator
MDL Number: MFCD00079532
CAS Number: 70458-96-7

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