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Herbicides

Monolinuron

Also known as 3-(4-Chlorophenyl)-1-methoxy-1-methylurea, Monorotox, Arezin

CAS 1746-81-2Formula C9H11ClN2O2Molar mass 214.65 g/molEC 217-129-5
GHS signal word: Warning. Pictograms: Harmful or irritant, Serious health hazard, Hazardous to the environment 9 suppliers listed
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Monolinuron chemical structure, C9H11ClN2O2, CAS 1746-81-2
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless crystals
Melting point
80 to 83
Solubility
735 ppm in water at 20 °C, sol in alcohol, acetone, benzene, toluene
HS code
292421
Category
Herbicides
Illustrative photo, colourless crystals beside an amber glass bottle on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Monolinuron?

Plain description, key identifiers and synonyms

Monolinuron is a member of ureas.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
3-(4-chlorophenyl)-1-methoxy-1-methylurea
CAS number
1746-81-2 CAS number cross-checked
EC number
217-129-5
Molecular formula
C9H11ClN2O2
UNII
6KJJ4XAD6M
MDL number
MFCD00055264
InChIKey
LKJPSUCKSLORMF-UHFFFAOYSA-N
InChI
InChI=1S/C9H11ClN2O2/c1-12(14-2)9(13)11-8-5-3-7(10)4-6-8/h3-6H,1-2H3,(H,11,13)
SMILES (canonical and isomeric)
CN(C(=O)NC1=CC=C(C=C1)Cl)OC

Synonyms

  • 3-(4-Chlorophenyl)-1-methoxy-1-methylurea
  • Monorotox
  • Arezin
  • Aresin
  • Arezine
  • Premalin
  • Urea, N'-(4-chlorophenyl)-N-methoxy-N-methyl-
  • HOE 2747
  • 3-(p-Chlorophenyl)-1-methoxy-1-methylurea
  • N'-(4-Chlorophenyl)-N-methoxy-N-methylurea
  • Urea, 3-(p-chlorophenyl)-1-methoxy-1-methyl-
  • N-(4-Chlorophenyl)-N'-methoxy-N-methylurea
  • HOE 02747
  • 3-(4-Chlorphenyl)-1-methoxy-1-methylharnstoff
  • 1-(4-chlorophenyl)-3-methoxy-3-methylurea
  • Arresin
  • Afesin
  • Monolinuron Solution in Methanol
  • Sdccgmls-0013702.p002
  • Monolinuron 10 microg/mL in Acetonitrile
  • Monolinuron 100 microg/mL in Acetonitrile
  • 1-Methoxy-1-methyl-3-(4-chlorophenyl)urea
  • 3-(4-chlorophenyl)-1-methoxy-1-methyl-urea
  • Monolinuron, 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
Colorless crystalsexp.
Odour
ODORLESSexp.
Melting point
80 to 83exp.
Solubility
735 ppm in water at 20 °C, sol in alcohol, acetone, benzene, tolueneexp.
Vapour pressure
1.5 × 10⁻⁴ MM HG AT 22 °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
214.65 g/molcalc.
Exact mass
214.0509 Dacalc.
LogP (octanol/water)
2.37calc.
Topological polar surface area
41.57 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
2calc.
Heavy atoms
14calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.22calc.
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
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302Harmful if swallowed.
  • H373May cause damage to organs through prolonged or repeated exposure.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (9)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • 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.
  • P319Get medical help if you feel unwell.
  • 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

Monolinuron suppliers

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

All 9 suppliers
9 of 9 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

9 suppliers in 3 countries

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Monolinuron price

Indicative price range per kg from live supplier offers

No published prices right now

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 various vegetable & fruit crops, cereal crops & ornamentals.

Selective herbicidal control of annual broad-leaf weeds and grasses in asparagus, berries, cereals, dwarf beans, grapes, leeks, maize, ornamental shrubs and trees, and potatoes.

Use classes: Pharmaceuticals.

How it is made

Reaction of 4-chlorophenyl isocyanate with (n-methyl) hydroxylamine, followed by reaction with dimethyl sulfate

Reaction of N,O-dimethylhydroxylamine with p-chlorophenyl isocyanate (isocyanate addition).

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 006-032-00-1

United States

  • TSCA inventory (USA)
    Status: Inactive 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 Monolinuron is traded under.

HS 2924.21Indicative HS code

Ureines and their derivatives, salts thereof

World exports in 2024
$149M
+12.5% vs 2023, imports $208M
2019 to 2024
Top exporters
  1. Germany25.4%
  2. China14.4%
  3. Israel12.0%
Top importers
  1. Brazil28.2%
  2. United States14.0%
  3. Japan10.0%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Monolinuron?

Monolinuron is a member of ureas.

What is the CAS number of Monolinuron?

The CAS registry number of Monolinuron is 1746-81-2.

What is the molecular formula and weight of Monolinuron?

The molecular formula of Monolinuron is C9H11ClN2O2 and its molar mass is 214.65 g/mol.

What is Monolinuron used for?

Herbicide for various vegetable & fruit crops, cereal crops & ornamentals. Selective herbicidal control of annual broad-leaf weeds and grasses in asparagus, berries, cereals, dwarf beans, grapes, leeks, maize, ornamental shrubs and trees, and potatoes. Use classes: Pharmaceuticals.

Is Monolinuron hazardous?

Monolinuron carries the GHS signal word "Warning". Main hazards: harmful if swallowed, may cause damage to organs through prolonged or repeated exposure, very toxic to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Monolinuron?

Monolinuron is usually classified under HS code 292421 (Ureines and their derivatives, salts thereof). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Monolinuron?

CompoundList lists 9 suppliers of Monolinuron in China, United States and Czech Republic. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Monolinuron?

Suppliers quote Monolinuron 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 Monolinuron

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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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