Norfloxacin for system suitability

European Pharmacopoeia (EP) Reference Standard

Norfloxacin, 1-Ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinolinecarboxylic acid, 1-Ethyl-6-fluoro-1,4-dihydro-4-oxo-7-piperazino-3-quinolinecarboxylic acid
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:


pharmaceutical primary standard





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General description

This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including SDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia.For further information and support please go to the website of the issuing Pharmacopoeia.

Biochem/physiol Actions

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


Unit quantity: 10 mg. Subject to change. The product is delivered as supplied by the issuing Pharmacopoeia. For the current unit quantity, please visit the EDQM reference substance catalogue.


Other Notes

Sales restrictions may apply.


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
Ying-Jun Zhou et al.
FEMS microbiology letters, 355(2), 124-130 (2014-05-13)
The antimicrobial activity of one 3-hydroxypyridin-4-one (HPO) hexadentate (1) and three HPO hexadentate-based dendrimeric chelators (2-4) was evaluated. They were found to exhibit marked inhibitory effect on the growth of two Gram-positive bacteria and two Gram-negative bacteria. The combination treatment...
Bacterial resistance to norfloxacin and other newer quinolones: pattern and prospects.
D R Nalin
European journal of cancer & clinical oncology, 24 Suppl 1, S55-S61 (1988-01-01)
L Miano et al.
European urology, 17 Suppl 1, 13-18 (1990-01-01)
A review of worldwide clinical trials with norfloxacin in the treatment of uncomplicated urinary tract infections (UTIs), as well as our personal experience with 215 assessable patients, is presented. Almost all patients received 400 mg b.i.d. for 3-15 days. Bacteriological...
E J Goldstein
The American journal of medicine, 82(6B), 3-17 (1987-06-26)
Norfloxacin is an orally absorbed fluoroquinolone antibacterial with a fluorine at position 6 and a piperazine ring at position 7. These changes have resulted in a marked enhancement (compared with that of the older quinolones) of in vitro antibacterial activity....
Nour El-Houda Jlili et al.
Journal of medical microbiology, 63(Pt 2), 195-202 (2013-11-07)
The prevalence of plasmid-mediated quinolone resistance genes [qnr, aac(6')-Ib-cr and qepA] was sought among Enterobacteriaceae strains obtained from the Children's Hospital of Tunis (Tunisia). Non-duplicate isolates (n = 278) with resistance to extended-spectrum cephalosporins and collected in 2003, 2007, 2008 and 2009...

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