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Herbicides

Flufenpyr

Also known as S-3153 acid, {2-chloro-4-fluoro-5-[5-methyl-6-oxo-4-(trifluoromethyl)pyridazin-1(6H)-yl]phenoxy}acetic acid, Acetic acid, (2-chloro-4-fluoro-5-(5-methyl-6-oxo-4-(trifluoromethyl)-1(6H)-pyridazinyl)phenoxy)-

CAS 188490-07-5Formula C14H9ClF4N2O4Molar mass 380.68 g/mol
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Flufenpyr chemical structure, C14H9ClF4N2O4, CAS 188490-07-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
188490-07-5
Formula
C14H9ClF4N2O4
Molar mass
380.68 g/mol
HS code
293399
Category
Herbicides

What is Flufenpyr?

Plain description, key identifiers and synonyms

Flufenpyr is a ring assembly that is phenoxyacetic acid in which the phenyl group has been substituted at position 2 by chlorine, position 4 by fluorine, and position 5 by a 5-methyl-6-oxo-4-(trifluoromethyl)pyridazin-1(6H)-yl group. Its esters, particularly the ethyl ester (flufenpyr-ethyl), are used as contact herbicides for the control of broad-leaved weeds. It has a role as a herbicide and an EC 1.3.3.4 (protoporphyrinogen oxidase) inhibitor. It is a monocarboxylic acid, a pyridazinone, an aromatic ether, a member of monochlorobenzenes and a member of monofluorobenzenes.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-[2-chloro-4-fluoro-5-[5-methyl-6-oxo-4-(trifluoromethyl)pyridazin-1-yl]phenoxy]acetic acid
CAS number
188490-07-5 CAS number cross-checked
Molecular formula
C14H9ClF4N2O4
UNII
624P72604K
InChIKey
WFZSZAXUALBVNX-UHFFFAOYSA-N
InChI
InChI=1S/C14H9ClF4N2O4/c1-6-7(14(17,18)19)4-20-21(13(6)24)10-3-11(25-5-12(22)23)8(15)2-9(10)16/h2-4H,5H2,1H3,(H,22,23)
SMILES (canonical and isomeric)
CC1=C(C=NN(C1=O)C2=CC(=C(C=C2F)Cl)OCC(=O)O)C(F)(F)F

Synonyms

  • S-3153 acid
  • {2-chloro-4-fluoro-5-[5-methyl-6-oxo-4-(trifluoromethyl)pyridazin-1(6H)-yl]phenoxy}acetic acid
  • Acetic acid, (2-chloro-4-fluoro-5-(5-methyl-6-oxo-4-(trifluoromethyl)-1(6H)-pyridazinyl)phenoxy)-
  • 2-(2-Chloro-4-fluoro-5-(5-methyl-6-oxo-4-(trifluoromethyl)-1(6H)-pyridazinyl)phenoxy)acetic acid
  • 2-[2-chloro-4-fluoro-5-[5-methyl-6-oxo-4-(trifluoromethyl)-1(6H)-pyridazinyl]phenoxy]acetic acid
  • 2-Chloro-5-(1,6-dihydro-5-methyl-6-oxo-4-(trifluoromethyl)pyridazin-1-yl)-4-fluorophenoxyacetic acid
  • 2-chloro-5-[1,6-dihydro-5-methyl-6-oxo-4-(trifluoromethyl)pyridazin-1-yl]-4-fluorophenoxyacetic acid
  • Acetic acid, 2-(2-chloro-4-fluoro-5-(5-methyl-6-oxo-4-(trifluoromethyl)-1(6H)-pyridazinyl)phenoxy)-
  • (2-chloro-4-fluoro-5-(5-methyl-6-oxo-4-(trifluoromethyl)pyridazin-1(6H)-yl)phenoxy)acetic acid
  • 2-(2-Chloro-4-fluoro-5-(5-methyl-6-oxo-4-(trifluoromethyl)pyridazin-1(6H)-yl)phenoxy)acetic acid
  • 2-[2-chloro-4-fluoro-5-[5-methyl-6-oxo-4-(trifluoromethyl)pyridazin-1- yl]phenoxy]acetic acid
  • 2-[2-chloro-4-fluoro-5-[5-methyl-6-oxo-4-(trifluoromethyl)pyridazin-1-yl]phenoxy]acetic acid
  • Flufenpyr 100 |Ig/mL in Acetonitrile
  • Flufenpyr 100 microg/mL in Acetonitrile

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
380.68 g/molcalc.
Exact mass
380.0187 Dacalc.
LogP (octanol/water)
2.82calc.
Topological polar surface area
81.42 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
4calc.
Heavy atoms
25calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.21calc.
Formal charge
0calc.
Stereocentres
0calc.
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=c1cccnn1-c1ccccc1

O=c1cccnn1-c1ccccc1

2 rings, 13 atoms, the 2-Phenyl-3(2H)-pyridazinone ring system.

525 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.

Flufenpyr suppliers

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Flufenpyr 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

Roles

  • enzyme inhibitor
  • herbicide
  • pesticide

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 Flufenpyr is traded under.

HS 2933.99Indicative HS code

Heterocyclic compounds with nitrogen hetero-atom(s) only, other

World exports in 2024
$12.1B
−31.0% vs 2023, imports $28.8B
2019 to 2024
Top exporters
  1. China30.5%
  2. India * partner reported16.3%
  3. Ireland9.0%
Top importers
  1. Slovenia31.7%
  2. Italy24.2%
  3. United States5.0%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Flufenpyr?

Flufenpyr is a ring assembly that is phenoxyacetic acid in which the phenyl group has been substituted at position 2 by chlorine, position 4 by fluorine, and position 5 by a 5-methyl-6-oxo-4-(trifluoromethyl)pyridazin-1(6H)-yl group.

What is the CAS number of Flufenpyr?

The CAS registry number of Flufenpyr is 188490-07-5.

What is the molecular formula and weight of Flufenpyr?

The molecular formula of Flufenpyr is C14H9ClF4N2O4 and its molar mass is 380.68 g/mol.

What is Flufenpyr used for?

Known uses and roles of Flufenpyr include herbicides in agriculture and crop protection, enzyme inhibitor, herbicide and pesticide.

Is Flufenpyr hazardous?

No GHS hazard classification for Flufenpyr 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 Flufenpyr?

Flufenpyr is usually classified under HS code 293399 (Heterocyclic compounds with nitrogen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Flufenpyr?

Post a free request on CompoundList and suppliers of Flufenpyr will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Flufenpyr?

Suppliers quote Flufenpyr 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 Flufenpyr

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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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