Flucloxacillin
Also called Floxapen and Floxacillin.
A penicillin antibiotic that resists the enzyme staph bacteria use to destroy penicillin, so it is used for skin and bone infections.
Sources and notes
- The introductionfrom sourceMoleculeFinder curated
- Other namesfrom sourceWikidataIts English label and aliases on 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.
Sources and notes
- The line abovefrom sourceMoleculeFinder curatedFrom the group the molecule belongs to.
Explore its structure
Choose a part to light it up.
A carbon carrying both a C=O and an O-H, written COOH. In water it gives up that hydrogen, which is what makes the molecule an acid.
From: standard chemistry.
A C=O bonded to a nitrogen, the same link that joins amino acids in a protein. It is sturdy, and its nitrogen is not a base the way an amine's is.
From: standard chemistry.
Fluorine, chlorine, bromine or iodine bonded to carbon. Each pulls electrons toward itself, and each is larger than the hydrogen the carbon would otherwise carry.
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
- C19H17ClFN3O5S
- Molecular weight
- 453.9 g/mol
- XLogP3octanol/water, log units
- 2.6
- Polar surface areatopological
- 138 Ų
- H-bond donors
- 2
- H-bond acceptors
- 8
- Rotatable bonds
- 4
- Complexity
- 758
Reported Licence
The Medicines and Healthcare products Regulatory Agency licenses Flucloxacillin for human use, as Floxapen. MHRA Products
Groups it belongs to
- Category
- Prescription medicine
- Family
- Antibiotics
- Chemical groups
- Carboxylic Acids, Aromatics, Amides, Halogenated
CC1=C(C(=NO1)C2=C(C=CC=C2Cl)F)C(=O)N[C@H]3[C@@H]4N(C3=O)[C@H](C(S4)(C)C)C(=O)OPubChem CID 21319 · Wikidata Q1994556 · InChIKey UIOFUWFRIANQPC-JKIFEVAISA-N · Data refreshed
Questions
- What is Flucloxacillin?
- A penicillin antibiotic that resists the enzyme staph bacteria use to destroy penicillin, so it is used for skin and bone infections.
- What kind of molecule is Flucloxacillin?
- Flucloxacillin has the formula C19H17ClFN3O5S and a molecular weight of 453.9 g/mol. MoleculeFinder files it under antibiotics, in the prescription medicine group. from sourcefrom sourcefrom sourcefrom source
- What else is Flucloxacillin called?
- Flucloxacillin is also called Floxapen and Floxacillin. from source
- Who licenses Flucloxacillin as a medicine?
- The Medicines and Healthcare products Regulatory Agency licenses Flucloxacillin for human use, as Floxapen. from source
Sources and notes
- Calculated valuescomputedPubChemComputed from the structure, so no laboratory conditions apply; complexity is PubChem's own structural score.
- Licencefrom sourceMHRA ProductsRead 2026-10-21. Contains public sector information licensed under the Open Government Licence v3.0.
- Data refreshedfrom sourceMoleculeFinder2026-11-09
Keep exploring
Sources and notes
- The same kind of moleculefrom sourceMoleculeFinder curated groupsA structural neighbour in the same family or type group; the line names the group in its own words.
- The drawingscomputedPubChem structures, drawn by RDKit