moleculefinder

Metronidazole

C6H9N3O3171.15 g/mol Calculated

Also called Anagiardil, Danizol, Deflamon and Gineflavir.

An antibiotic sold as Flagyl that works on bacteria and parasites that live without oxygen, so it treats dental, gut and some vaginal infections.

Sources and notes
  • The introductionfrom sourceMoleculeFinder curated
  • Other namesfrom sourcePubChem / Wikidata
  • Formula and weightcomputedPubChem
  • 2D drawingcomputedPubChem structure, drawn by RDKit
  • 3D modelfrom sourcePubChem 3D conformerLoaded after the page has painted, and on a phone only when you ask for it; the 2D drawing shows until it arrives.

Where you encounter it

Dispensed on prescription, not sold on a shelf. Metronidazole on the product labels we hold.

Medicines

FlagylAdded by the makerActive ingredient

Every product and list we hold

Sources and notes
  • The product labels and their strengthsfrom sourceDailyMed (FDA label)Each label lists the molecule as an ingredient, and an active ingredient at the strength shown.
  • How it gets therefrom sourceMoleculeFinder curatedEach mark is set by hand on our lists, never inferred; a label's ingredient is added by the maker. A row with no mark data says Not marked.
  • The line abovefrom sourceMoleculeFinder curatedFrom the group the molecule belongs to.

Explore its structure

Choose a part to light it up.

An O-H on a carbon that is not part of an aromatic ring, the group that makes a molecule an alcohol. It both gives and accepts hydrogen bonds, which helps the molecule mix with water.

From: standard chemistry.

Sources and notes
  • The drawingcomputedPubChem structure, drawn by RDKitThe page's one shipped drawing, with the chosen part lit in amber under it.
  • The partscomputedFound by ruleEach part is found by a chemical pattern, never picked by hand atom by atom; its words say where they come from.

Properties and sources

Calculated by PubChem

Molecular formula
C6H9N3O3
Molecular weight
171.15 g/mol
XLogP3octanol/water, log units
0
Polar surface areatopological
83.9 Ų
H-bond donors
1
H-bond acceptors
4
Rotatable bonds
2
Complexity
170

Reported Hazard label (GHS), ECHA via PubChem

Danger Irritant pictogram (GHS07) and Health hazard pictogram (GHS08); hazard statements H302, H312, H332, H341, H350, H351, H373, H412

Reported Licence

The US Food and Drug Administration licenses Metronidazole for human use (NDA 018657, authorized December 24, 1981), as Flagyl I.V. RTU In Plastic Container. Drugs@FDA

Groups it belongs to

Category
Prescription medicine
Family
Antibiotics
Chemical groups
Alcohols
Elements
Nitrogen
Hazard classes
Irritant, Health hazard, GHS Danger
SMILESCC1=NC=C(N1CCO)[N+](=O)[O-]

PubChem CID 4173 · Wikidata Q169569 · InChIKey VAOCPAMSLUNLGC-UHFFFAOYSA-N · Data refreshed

How MoleculeFinder sources and labels its data

Questions
What is Metronidazole?
An antibiotic sold as Flagyl that works on bacteria and parasites that live without oxygen, so it treats dental, gut and some vaginal infections.
How toxic is Metronidazole?
Its GHS hazard label carries the signal word Danger and the hazard pictograms Irritant and Health hazard. from source
What kind of molecule is Metronidazole?
Metronidazole has the formula C6H9N3O3 and a molecular weight of 171.15 g/mol. MoleculeFinder files it under antibiotics, in the prescription medicine group. from sourcefrom sourcefrom sourcefrom source
Who licenses Metronidazole as a medicine?
The US Food and Drug Administration licenses Metronidazole for human use (NDA 018657, authorized December 24, 1981), as Flagyl I.V. RTU In Plastic Container. from source
Sources and notes
  • Calculated valuescomputedPubChemComputed from the structure, so no laboratory conditions apply; complexity is PubChem's own structural score.
  • Hazard labelfrom sourceECHA via PubChemThe label combines these classifications.
  • ECHAfrom sourceAttributionSource: European Chemicals Agency, echa.europa.eu.
  • Licencefrom sourceDrugs@FDARead 2026-10-21.
  • Data refreshedfrom sourceMoleculeFinder2026-11-09