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Herbicides

Metolachlor

Also known as Pennant, Codal, Dual

CAS 51218-45-2Formula C15H22ClNO2Molar mass 283.80 g/molEC 257-060-8
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Harmful or irritant, Hazardous to the environment 51 suppliers listed
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Metolachlor chemical structure, C15H22ClNO2, CAS 51218-45-2
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless liquid
Melting point
-62.1 °C
Boiling point
100 °C
Density
1.12 g/cm³ at 20 °C
Flash point
93.3 °C
HS code
292429
Category
Herbicides
Illustrative photo, 200 litre steel drums of liquid in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Metolachlor?

Plain description, key identifiers and synonyms

2-chloro-N-(2-ethyl-6-methylphenyl)-N-(1-methoxypropan-2-yl)acetamide is an organochlorine compound that is 2-chloroacetamide substituted by a (2-ethyl-6-methylphenyl)-N-(1-methoxypropan-2-yl) group at the nitrogen atom. It is a member of benzenes, an ether, an organochlorine compound and an aromatic amide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-chloro-N-(2-ethyl-6-methylphenyl)-N-(1-methoxypropan-2-yl)acetamide
CAS number
51218-45-2 CAS number cross-checkedOther or deprecated CAS: 63150-68-5, 82535-90-8
EC number
257-060-8
Molecular formula
C15H22ClNO2
UNII
X0I01K05X2
MDL number
MFCD00055293
InChIKey
WVQBLGZPHOPPFO-UHFFFAOYSA-N
InChI
InChI=1S/C15H22ClNO2/c1-5-13-8-6-7-11(2)15(13)17(14(18)9-16)12(3)10-19-4/h6-8,12H,5,9-10H2,1-4H3
SMILES (canonical and isomeric)
CCC1=CC=CC(=C1N(C(C)COC)C(=O)CCl)C

Synonyms

  • Pennant
  • Codal
  • Dual
  • Yibingjiacaoan
  • Dual Magnum
  • Dual Triple
  • Metelilachlor
  • Dual II
  • Humextra
  • Ontrack 8E
  • Dual 720EC
  • Dual 8E
  • Dual 960 EC
  • Metolachlor technical
  • Metolachlore
  • Jindual
  • Metoken
  • 2-Chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide
  • N-(1-Methyl-2-methoxyethyl)-N-chloroacetyl-2-ethyl-6-methylaniline
  • Acetamide, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)-
  • 2-Chloro-6'-ethyl-N-(2-methoxy-1-methylethyl)-o-acetotoluidine
  • 2-Chloro-6'-ethyl-N-(2-methoxy-1-methylethyl)acet-o-toluidide
  • N-(2'-Methoxy-1'-methylethyl)-2'-ethyl-6'-methyl-2-chloroacetanilide
  • 2-Aethyl-6-methyl-N-(1-methyl-2-methoxyaethyl)-chloracetanilid
  • alpha-Chlor-6'-aethyl-N-(2-methoxy-1-methylaethyl)-acet-o-toluidin
Show all 37 synonyms
  • 2-chloro-N-(2-ethyl-6-methyl-phenyl)-N-(2-methoxy-1-methyl-ethyl)acetamide
  • 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxyethyl)acetamide
  • Bicep
  • Cotoran multi
  • Primagram
  • Primextra
  • 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(1-methoxypropan-2-yl)acetamide
  • Metolachor
  • CGA 24705
  • Metetilachlor
  • Acetamide, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)-, stereoisomer
  • Metolachlore [ISO-French]

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
Colorless liquidexp.
Melting point
-62.1 °Cexp.
Boiling point
100 °Cexp.
Density
1.12 g/cm³ at 20 °Cexp.
Flash point
93.3 °Cexp.
Autoignition temperature
265.6 °Cexp.
Solubility
In water, 530 mg/L at 20 °Cexp.
Vapour pressure
3.14 × 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
283.80 g/molcalc.
Exact mass
283.1339 Dacalc.
LogP (octanol/water)
3.16calc.
Topological polar surface area
29.54 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
6calc.
Heavy atoms
19calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.53calc.
Formal charge
0calc.
Stereocentres
1calc.
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
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H317May cause an allergic skin reaction.
  • H330Fatal if inhaled.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (18)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P271Use only outdoors or in a well-ventilated area.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P284In case of inadequate ventilation wear respiratory protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P316Get emergency medical help immediately.
  • P320Specific treatment is urgent (see supplemental first aid instructions on the label).
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P391Collect spillage.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • 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

Metolachlor suppliers

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All 51 suppliers
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Where suppliers are based

51 suppliers in 13 countries

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Metolachlor 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

Herbicide.

Preemergence and preplant incorporated weed control.

Control of annual grasses and some broad-leaved weeds ... Often used in combination with broad-leaved herbicides, to extend the spectrum of activity.

S-metolachlor is a chloroactanilide herbicide, classified as a seedling shoot growth inhibitor. (S-Metolachlor).

Use classes: Herbicides, Pesticides.

Pharmacological actions

  • Herbicides

Roles

  • environmental contaminant
  • herbicide
  • pesticide
  • xenobiotic

Functional uses

  • Biocide

How it is made

(A) A mixture of 540 g (4.0 mols) of 2-ethyl-6-methylaniline and 306 g (2.0 moles) of 2-bromo-1-methoxypropane is heated for 40 hours at reduced pressure (10 mmHg) to 120 °C with stirring. After it has cooled, the light red, viscous solution is diluted with 200 mL of water and made alkaline with 210 mL of concentrated sodium hydroxide solution. The precipitated product is taken up in ether, and the ethereal solution is washed neutral with water, dried, and evaporated.

Read more

Distillation of the residue yields pure-2-ethyl-6-methyl-N-[1'-methoxy-prop-2'-yl]-aniline which boils at 64 deg to 66 °C/0.07 Torr. (B) A solution of 9.7 g (0.047 mol) of the intermediate described under (A) and 5.05 g (0.05 mol) of triethylamine in 30 mL of benzene is treated dropwise with a solution of 5.65 g (0.05 mol) of chloroacetyl chloride in 10 mL of absolute benzene, and the mixture is further stirred for 2 hours at room temperature. The reaction mixture is diluted with ether, the solution repeatedly washed with water, and dried. The solvent mixture is evaporated off in vacuo to give pure-2-ethyl-6-methyl-N-[1'-methoxy-prop-2'-yl]-chloroacetanilide.

Preparation: C. Vogel, R. Aebi, DE 2328340, eidem, US 3937730 (1973, 1976 both to Ciba-Geigy).

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 Metolachlor is traded under.

HS 2924.29Indicative HS code

Cyclic amides (including cyclic carbamates) and their derivatives, salts thereof, other

World exports in 2024
$5.69B
−5.1% vs 2023, imports $5.8B
2019 to 2024
Top exporters
  1. China32.3%
  2. Switzerland * partner reported13.6%
  3. Norway * partner reported12.8%
Top importers
  1. United States15.9%
  2. Ireland15.8%
  3. Germany11.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Metolachlor?

2-chloro-N-(2-ethyl-6-methylphenyl)-N-(1-methoxypropan-2-yl)acetamide is an organochlorine compound that is 2-chloroacetamide substituted by a (2-ethyl-6-methylphenyl)-N-(1-methoxypropan-2-yl) group at the nitrogen atom. It is a member of benzenes, an ether, an organochlorine compound and an aromatic amide.

What is the CAS number of Metolachlor?

The CAS registry number of Metolachlor is 51218-45-2. Other or deprecated CAS numbers: 63150-68-5, 82535-90-8.

What is the molecular formula and weight of Metolachlor?

The molecular formula of Metolachlor is C15H22ClNO2 and its molar mass is 283.80 g/mol.

What is Metolachlor used for?

Herbicide. Preemergence and preplant incorporated weed control. Control of annual grasses and some broad-leaved weeds ... Often used in combination with broad-leaved herbicides, to extend the spectrum of activity. S-metolachlor is a chloroactanilide herbicide, classified as a seedling shoot growth inhibitor.

Is Metolachlor hazardous?

Metolachlor carries the GHS signal word "Danger". Main hazards: may cause an allergic skin reaction, fatal if inhaled, very toxic to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Metolachlor?

Metolachlor is usually classified under HS code 292429 (Cyclic amides (including cyclic carbamates) and their derivatives, salts thereof, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Metolachlor?

CompoundList lists 51 suppliers of Metolachlor in China, United States, India, Hong Kong and 9 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Metolachlor in India?

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

What is the price of Metolachlor?

Suppliers quote Metolachlor 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 Metolachlor

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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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