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Herbicides

Clomazone

Also known as Dimethazone, 2-(2-Chlorobenzyl)-4,4-dimethylisoxazolidin-3-one, Command

CAS 81777-89-1Formula C12H14ClNO2Molar mass 239.70 g/molEC 617-258-0
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 134 suppliers listed
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Clomazone chemical structure, C12H14ClNO2, CAS 81777-89-1
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Clear colorless to light brown viscous liquid
Melting point
25 °C
Boiling point
275 °C
Density
1.192 at 25 °C
Flash point
41.1 to 42.8
HS code
293499
Category
Herbicides
Illustrative photo, clear colourless liquid in a glass reagent bottle on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Clomazone?

Plain description, key identifiers and synonyms

Clomazone is an isoxazolidinone that is 1,2-oxazolidin-3-one substituted by a 2-chlorobenzyl group at position 2 and two methyl groups at position 4. It has a role as a carotenoid biosynthesis inhibitor, a herbicide, an agrochemical, a xenobiotic and an environmental contaminant. It is an isoxazolidinone and a member of monochlorobenzenes.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-[(2-chlorophenyl)methyl]-4,4-dimethyl-1,2-oxazolidin-3-one
CAS number
81777-89-1 CAS number cross-checkedOther or deprecated CAS: 89493-06-1
EC number
617-258-0
Molecular formula
C12H14ClNO2
UNII
570RAC03NF
MDL number
MFCD00072457
InChIKey
KIEDNEWSYUYDSN-UHFFFAOYSA-N
InChI
InChI=1S/C12H14ClNO2/c1-12(2)8-16-14(11(12)15)7-9-5-3-4-6-10(9)13/h3-6H,7-8H2,1-2H3
SMILES (canonical and isomeric)
CC1(CON(C1=O)CC2=CC=CC=C2Cl)C

Synonyms

  • Dimethazone
  • 2-(2-Chlorobenzyl)-4,4-dimethylisoxazolidin-3-one
  • Command
  • Gamit
  • FMC 57020
  • 2-(2-Chlorobenzyl)-4,4-dimethyl-1,2-oxazolidin-3-one
  • 2-[(2-chlorophenyl)methyl]-4,4-dimethyl-1,2-oxazolidin-3-one
  • 2-((2-Chlorophenyl)methyl)-4,4-dimethyl-3-isoxazolidinone
  • 2-[(2-chlorophenyl)methyl]-4,4-dimethyl-isoxazolidin-3-one
  • 3-Isoxazolidinone, 2-((2-chlorophenyl)methyl)-4,4-dimethyl-
  • 2-(2-chlorophenyl)methyl-4,4-dimethyl-3-isoxazolidinone
  • 2-((2-chlorophenyl)methyl)-4,4-dimethyl-isoxazolidin-3-one
  • 2-((2-chlorophenyl)methyl)-4,4-dimethyl-1,2-oxazolidin-3-one
  • clomazone (ISO), 2-(2-chlorobenzyl)-4,4-dimethyl-1,2-oxazolidin-3-one
  • Clomazon
  • Clomazone (Standard)
  • Clomazone 10 |Ig/mL in Cyclohexane
  • Clomazone 1000 |Ig/mL in Acetone
  • Clomazone 10 |Ig/mL in Acetonitrile
  • Clomazone 1000 microg/mL in Acetone
  • Clomazone 10 microg/mL in Cyclohexane
  • Clomazone 10 microg/mL in Acetonitrile
  • Clomazone, PESTANAL(R), analytical standard
  • 2-(2-Chlorobenzyl)-4,4-dimethyl-3-isoxazolidinone
  • 2-(2-Chlorobenzyl)-4,4-dimethyl-3-isoxazolidinone #

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
Clear colorless to light brown viscous liquidexp.
Melting point
25 °Cexp.
Boiling point
275 °Cexp.
Density
1.192 at 25 °Cexp.
Flash point
41.1 to 42.8exp.
Solubility
In water, 1,100 ppm at 25 °Cexp.
Vapour pressure
1.4 × 10⁻⁴ 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
239.70 g/molcalc.
Exact mass
239.0713 Dacalc.
LogP (octanol/water)
2.64calc.
Topological polar surface area
29.54 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
2calc.
Heavy atoms
16calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.42calc.
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=C1CCON1Cc1ccccc1

O=C1CCON1Cc1ccccc1

2 rings, 13 atoms.

39 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.
  • H332Harmful if inhaled.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (11)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P273Avoid release to the environment.
  • P301 + P317If swallowed: Get medical help.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P317Get 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

Clomazone suppliers

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

All 134 suppliers
30 of 30 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

134 suppliers in 16 countries

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Clomazone price

Indicative price range per kg from live supplier offers

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Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Herbicide, For annual grasses, broadleaf weeds in beans (succulent), cabbage, cotton, cucumbers, melons, peas, pepers, rice, soy beans, squash, sugarcane, sweet potato, tobacco, tuberous and corn vegetables, weeds in chemical fallow wheat fields.

Use classes: Pesticides, Herbicides.

Roles

  • agrochemical
  • carotenoid biosynthesis inhibitor
  • environmental contaminant
  • enzyme inhibitor
  • herbicide
  • pathway inhibitor
  • pesticide
  • xenobiotic

Functional uses

  • Biocide

How it is made

Preparation: J. H. Chang, BE 889040, idem, US 4405357 (1982, 1983 both to FMC)

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 613-340-00-5

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2934.99Indicative HS code

Nucleic acids and their salts, other heterocyclic compounds, not elsewhere classified in heading 2934

World exports in 2024
$26.7B
+15.0% vs 2023, imports $26.3B
2019 to 2024
Top exporters
  1. Ireland26.3%
  2. China15.7%
  3. Singapore10.3%
Top importers
  1. United States24.5%
  2. Germany23.1%
  3. Japan4.5%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Clomazone?

Clomazone is an isoxazolidinone that is 1,2-oxazolidin-3-one substituted by a 2-chlorobenzyl group at position 2 and two methyl groups at position 4. It has a role as a carotenoid biosynthesis inhibitor, a herbicide, an agrochemical, a xenobiotic and an environmental contaminant.

What is the CAS number of Clomazone?

The CAS registry number of Clomazone is 81777-89-1. Other or deprecated CAS numbers: 89493-06-1.

What is the molecular formula and weight of Clomazone?

The molecular formula of Clomazone is C12H14ClNO2 and its molar mass is 239.70 g/mol.

What is Clomazone used for?

Herbicide, For annual grasses, broadleaf weeds in beans (succulent), cabbage, cotton, cucumbers, melons, peas, pepers, rice, soy beans, squash, sugarcane, sweet potato, tobacco, tuberous and corn vegetables, weeds in chemical fallow wheat fields. Use classes: Pesticides, Herbicides.

Is Clomazone hazardous?

Clomazone carries the GHS signal word "Warning". Main hazards: harmful if swallowed, harmful 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 Clomazone?

Clomazone is usually classified under HS code 293499 (Nucleic acids and their salts, whether or not chemically defined, other heterocyclic…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Clomazone?

CompoundList lists 134 suppliers of Clomazone in China, Brazil, India, France and 12 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Clomazone in India?

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

What is the price of Clomazone?

Suppliers quote Clomazone 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 Clomazone

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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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