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Antibiotics and anti-infectives

Flucloxacillin

Also known as Floxacillin, flucloxacilina, Flucloxacilline

CAS 5250-39-5Formula C19H17ClFN3O5SMolar mass 453.88 g/molEC 226-051-0
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Flucloxacillin chemical structure, C19H17ClFN3O5S, CAS 5250-39-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
5250-39-5
Formula
C19H17ClFN3O5S
Molar mass
453.88 g/mol
EC number
226-051-0
HS code
294110
Category
Antibiotics and anti-infectives

What is Flucloxacillin?

Plain description, key identifiers and synonyms

Flucloxacillin is a penicillin compound having a 6beta-[3-(2-chloro-6-fluorophenyl)-5-methyl-1,2-oxazole-4-carboxamido] side-chain. It has a role as an antibacterial drug. It is a penicillin and a penicillin allergen. It is a conjugate acid of a flucloxacillin(1-).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2S,5R,6R)-6-[[3-(2-chloro-6-fluorophenyl)-5-methyl-1,2-oxazole-4-carbonyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
CAS number
5250-39-5 CAS number cross-checked
EC number
226-051-0
Molecular formula
C19H17ClFN3O5S
UNII
43B2M34G2V
InChIKey
UIOFUWFRIANQPC-JKIFEVAISA-N
InChI
InChI=1S/C19H17ClFN3O5S/c1-7-10(12(23-29-7)11-8(20)5-4-6-9(11)21)15(25)22-13-16(26)24-14(18(27)28)19(2,3)30-17(13)24/h4-6,13-14,17H,1-3H3,(H,22,25)(H,27,28)/t13-,14+,17-/m1/s1
Canonical SMILES
Cc1onc(-c2c(F)cccc2Cl)c1C(=O)NC1C(=O)N2C1SC(C)(C)C2C(=O)O
Isomeric SMILES
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)O

Synonyms

  • Floxacillin
  • flucloxacilina
  • Flucloxacilline
  • Flucloxacillinum
  • BRL 2039
  • 3-(2-Chloro-6-fluorophenyl)-5-methyl-4-isoxazolylpenicillin
  • (2S,5R,6R)-6-[[3-(2-chloro-6-fluorophenyl)-5-methyl-1,2-oxazole-4-carbonyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
  • (2S,5R,6R)-6-[3-(2-chloro-6-fluorophenyl)-5-methyl-1,2-oxazole-4-amido]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
  • Fluorochloroxacillin
  • 6-(3-(2-Chloro-6-fluorophenyl)-5-methyl-4-isoxazolecarboxamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid
  • Abboflox
  • Staphlipen
  • (2S,5R,6R)-6-({[3-(2-chloro-6-fluorophenyl)-5-methyl-1,2-oxazol-4-yl]carbonyl}amino)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
  • flucloxacillina
  • Flucloxin
  • Galfloxin
  • Rimaflox
  • (2S,5R,6R)-6-(((3-(2-chloro-6-fluorophenyl)-5-methyl-1,2-oxazol-4-yl)carbonyl)amino)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid
  • (2S,5R,6R)-6-((3-(2-chloro-6-fluorophenyl)-5-methyl-1,2-oxazole-4-carbonyl)amino)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid
  • (2S,5R,6R)-6-(3-(2-chloro-6-fluorophenyl)-5-methyl-1,2-oxazole-4-amido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid
  • 6-[3-(2-Chloro-6-fluorophenyl)-5-methyl-4-isoxazolecarboxamido]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
  • Fluclomix-250
  • Fluclomix-500
  • Zoxin 250
  • Zoxin 500
Show all 33 synonyms
  • Flucloxacillin-Sodium
  • Floxacillin (USAN)
  • Flucloxacillin (INN)
  • Floxapen (TN)
  • (2S,5R,6R)-6-[[3-(2-chloro-6-fluoro-phenyl)-5-methyl-isoxazole-4-carbonyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
  • C19H17ClFN3O5S
  • Floxacillin sodium anhydrous
  • Flucloxacillin sodium anhydrous

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
453.88 g/molcalc.
Exact mass
453.0561 Dacalc.
LogP (octanol/water)
2.69calc.
Topological polar surface area
112.7 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
6calc.
Rotatable bonds
4calc.
Heavy atoms
30calc.
Rings
4calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.37calc.
Formal charge
0calc.
Stereocentres
3calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=C(NC1C(=O)N2CCSC12)c1conc1-c1ccccc1

O=C(NC1C(=O)N2CCSC12)c1conc1-c1ccccc1

4 rings, 22 atoms.

48 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Flucloxacillin suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 21 suppliers
21 of 21 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

21 suppliers in 6 countries

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Flucloxacillin price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Pharmacological actions

  • Anti-Bacterial Agents

Roles

  • antibacterial agent
  • antibacterial drug
  • antiinfective agent
  • antimicrobial agent
  • antimicrobial drug
  • pharmaceutical

Functional uses

  • Pharmaceutical

Pharmacology

Flucloxacillin is a narrow-spectrum, semisynthetic isoxazolyl penicillin with antibacterial activity. Floxacillin binds to and inactivates penicillin-binding proteins (PBPs) located on the inner membrane of the bacterial cell wall. Inactivation of PBPs interferes with the cross-linkage of peptidoglycan chains necessary for bacterial cell wall strength and rigidity. This interrupts bacterial cell wall synthesis and results in the weakening of the bacterial cell wall, eventually causing cell lysis.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Flucloxacillin is traded under.

HS 2941.10Indicative HS code

Penicillins and their derivatives with a penicillanic acid structure, salts thereof

World exports in 2024
$1.66B
−2.5% vs 2023, imports $1.63B
2019 to 2024
Top exporters
  1. China56.8%
  2. Spain13.1%
  3. India * partner reported7.7%
Top importers
  1. India * partner reported16.4%
  2. Austria9.3%
  3. Brazil5.4%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Flucloxacillin is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Flucloxacillin, based on the data on this page

What is Flucloxacillin?

Flucloxacillin is a penicillin compound having a 6beta-[3-(2-chloro-6-fluorophenyl)-5-methyl-1,2-oxazole-4-carboxamido] side-chain. It has a role as an antibacterial drug. It is a penicillin and a penicillin allergen. It is a conjugate acid of a flucloxacillin(1-).

What is the CAS number of Flucloxacillin?

The CAS registry number of Flucloxacillin is 5250-39-5.

What is the molecular formula and weight of Flucloxacillin?

The molecular formula of Flucloxacillin is C19H17ClFN3O5S and its molar mass is 453.88 g/mol.

What is Flucloxacillin used for?

Known uses and roles of Flucloxacillin include antibacterials and antibiotics in pharmaceuticals, antibacterial agent, antibacterial drug, antiinfective agent, antimicrobial agent and 3 more.

Is Flucloxacillin hazardous?

No GHS hazard classification for Flucloxacillin is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Flucloxacillin?

Flucloxacillin is usually classified under HS code 294110 (Penicillins and their derivatives with a penicillanic acid structure, salts thereof). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Flucloxacillin?

CompoundList lists 21 suppliers of Flucloxacillin in Bangladesh, India, United States, Australia and 2 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Flucloxacillin in India?

2 suppliers in India list Flucloxacillin on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Flucloxacillin?

Suppliers quote Flucloxacillin on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Flucloxacillin

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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