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Herbicides

Chlorfenac

Also known as Fenac, Kanepar, Fenae

CAS 85-34-7Formula C8H5Cl3O2Molar mass 239.49 g/molEC 201-599-3
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 2 suppliers listed
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Chlorfenac chemical structure, C8H5Cl3O2, CAS 85-34-7
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Crystals from benzene
Melting point
161 °C
Solubility
200 MG/L WATER @ 28 °C, SOL IN MOST ORGANIC SOLVENTS
HS code
291639
Category
Herbicides
Illustrative photo, 25 kg white woven sacks of powder on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Chlorfenac?

Plain description, key identifiers and synonyms

Chlorfenac is a member of the class of phenylacetic acids that is phenylacetic acid in which the phenyl group has been substituted by chlorines at positions 2, 3, and 6. An obsolete herbicide that was used as its sodium and ammonium salts. It has a role as a herbicide, a synthetic auxin and an agrochemical. It is a member of phenylacetic acids and a trichlorobenzene. It is a conjugate acid of a chlorfenac(1-).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-(2,3,6-trichlorophenyl)acetic acid
CAS number
85-34-7 CAS number cross-checked
EC number
201-599-3
Molecular formula
C8H5Cl3O2
UNII
8SOV3EP1QG
InChIKey
QZXCCPZJCKEPSA-UHFFFAOYSA-N
InChI
InChI=1S/C8H5Cl3O2/c9-5-1-2-6(10)8(11)4(5)3-7(12)13/h1-2H,3H2,(H,12,13)
SMILES (canonical and isomeric)
C1=CC(=C(C(=C1Cl)CC(=O)O)Cl)Cl

Synonyms

  • Fenac
  • Kanepar
  • Fenae
  • Tri-fen
  • 2,3,6-Trichlorophenylacetic acid
  • Trifene
  • Tri-fene
  • 2,3,6-Trichlorobenzeneacetic acid
  • Tri fene
  • Acetic acid, (2,3,6-trichlorophenyl)-
  • Benzeneacetic acid, 2,3,6-trichloro-
  • 2,3,6-TCA
  • 2,3,6-Trichlorphenylessigsaeure
  • 2,3,6-Trichlorophenyl acetic acid
  • Fenatrol
  • Trifen
  • 2-(2,3,6-trichlorophenyl)acetic acid
  • (2,3,6-Trichlorophenyl)acetic acid
  • Kyselina 2,3,6-trichlorfenyloctova
  • 2,6-Trichlorphenylessigsaeure
  • (2,6-Trichlorophenyl)acetic acid
  • 2,3,6-Trichlorophenylacetic-acid
  • Benzeneacetic acid,3,6-trichloro-
  • Acetic acid,3,6-trichlorophenyl)-
  • (2,3,6-trichlorophenyl)ethanoic acid
Show all 26 synonyms
  • Chlorfenac, PESTANAL(R), analytical standard

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

Appearance
Crystals from benzeneexp.
Melting point
161 °Cexp.
Solubility
200 MG/L WATER @ 28 °C, SOL IN MOST ORGANIC SOLVENTSexp.
Vapour pressure
1.7 × 10⁻⁵ mm Hg at 25 °Cexp.

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
239.49 g/molcalc.
Exact mass
237.9355 Dacalc.
LogP (octanol/water)
3.27calc.
Topological polar surface area
37.3 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
2calc.
Heavy atoms
13calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.13calc.
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, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302Harmful if swallowed.
  • H411Toxic to aquatic life with long lasting effects.
Precautionary statements (7)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.

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

Full safety data and first aid

Chlorfenac suppliers

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All 2 suppliers

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Where suppliers are based

2 suppliers in 2 countries

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Chlorfenac price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

The active ingredient is no longer contained in any registered pesticide products ... "cancelled.".

Herbicide.

Use classes: Herbicides.

Roles

  • agonist
  • agrochemical
  • auxin
  • growth regulator
  • herbicide
  • hormone
  • molecular messenger
  • pesticide
  • plant growth regulator
  • plant hormone
  • synthetic auxin
  • xenobiotic

How it is made

Prepared by conversion of 2,3,6-trichlorotoluene to the benzyl chloride, the benzyl cyanide, then hydrolysis...

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 607-074-00-9

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2916.39Indicative HS code

Aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and…

World exports in 2024
$706M
−6.8% vs 2023, imports $714M
2019 to 2024
Top exporters
  1. China49.0%
  2. India * partner reported16.2%
  3. Germany13.2%
Top importers
  1. India * partner reported14.5%
  2. United States12.2%
  3. Germany8.6%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Chlorfenac?

Chlorfenac is a member of the class of phenylacetic acids that is phenylacetic acid in which the phenyl group has been substituted by chlorines at positions 2, 3, and 6. An obsolete herbicide that was used as its sodium and ammonium salts. It has a role as a herbicide, a synthetic auxin and an agrochemical.

What is the CAS number of Chlorfenac?

The CAS registry number of Chlorfenac is 85-34-7.

What is the molecular formula and weight of Chlorfenac?

The molecular formula of Chlorfenac is C8H5Cl3O2 and its molar mass is 239.49 g/mol.

What is Chlorfenac used for?

The active ingredient is no longer contained in any registered pesticide products ... "cancelled.". Herbicide. Use classes: Herbicides.

Is Chlorfenac hazardous?

Chlorfenac carries the GHS signal word "Warning". Main hazards: harmful if swallowed, toxic to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Chlorfenac?

Chlorfenac is usually classified under HS code 291639 (Aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Chlorfenac?

CompoundList lists 2 suppliers of Chlorfenac in Germany and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Chlorfenac?

Suppliers quote Chlorfenac 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 Chlorfenac

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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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