Monuron
Last updated: 11/09/2023
(Also known as: chlorfenidim; CMU)
Monuron is an obsolete herbicide. Moderately toxic to humans and a suspected carcinogen. Moderately soluble in water, volatile, persistent in soil and has a high potential to leach into groundwater. Moderately toxic to wildlife but expected to be safe for honeybees.
The following alerts are based on the data in the tables below. An absence of an alert does not imply the substance has no implications for human health, biodiversity or the environment but just that we do not have the data to form a judgement.
Environmental fate
Ecotoxicity
Human health
A herbicide used to control a wide range of annual and perennial broad-leaved weeds and grasses
Soil sterilant; Annual and perennial grasses; Broad-leaf weeds
Non-cropped areas; Aspargus; Cotton; Ornamental shrubs; Sugar beet
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Considered obsolete but may be available in some countries
circa 1952
Not approved
Expired
No UK approval for use
EC Regulation 1107/2009 (repealing 91/414)
Not approved
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Expired
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Yes
ATAustria
BEBelgium
BGBulgaria
CYCyprus
CZCzech Republic
DEGermany
DKDenmark
EEEstonia
ELGreece
 
 
 
 
 
 
 
 
 
ESSpain
FIFinland
FRFrance
HRCroatia
HUHungary
IEIreland
ITItaly
LTLithuania
LULuxembourg
 
 
 
 
 
 
 
 
 
LVLatvia
MTMalta
NLNetherlands
PLPoland
PTPortugal
RORomania
SESweden
SISlovenia
SKSlovakia
 
 
 
 
 
 
 
 
 
ISIceland
NONorway
 
 
 
 
 
 
 
 
 
None
C₉H₁₁CIN₂O
CN(C)C(=O)NC1=CC=C(C=C1)Cl
No data
BMLIZLVNXIYGCK-UHFFFAOYSA-N
InChI=1S/C9H11ClN2O/c1-12(2)9(13)11-8-5-3-7(10)4-6-8/h3-6H,1-2H3,(H,11,13)
Yes
Cambridge Crystallographic Data Centre diagrams
Common Name
Relationship
Link
monuron
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Herbicide
Phenylurea herbicide; Urea herbicide
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Synthetic
Non-selective, systemic which inhibits photosynthesis
150-68-5
205-766-1
99
035501
8800
006-042-00-6
198.65
N-(4-chlorophenyl)-N,N-dimethylurea
3-(4-chlorophenyl)-1,1-dimethylurea
N'-(4-chlorophenyl)-N,N-dimethylurea
Chemical subject to PIC regulations; Potential groundwater contaminant
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C2
5
Not applicable
Not applicable
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Solid
Usually supplied as a wettable powder
230
H4 H = The US ARS pesticide properties database. Dataset is no longer available. 4 = Verified data
Moderate
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6.17 X 1001
Calculated
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1.79
H4 H = The US ARS pesticide properties database. Dataset is no longer available. 4 = Verified data
Low
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0.067
H4 H = The US ARS pesticide properties database. Dataset is no longer available. 4 = Verified data
Low volatility
5.80 X 10-05
Non-volatile
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170
M4 M = GLEAMS Model database (Groundwater Loading Effects of Agricultural Management Systems). Dataset no longer available. 4 = Verified data
Persistent
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Best available data
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Soil adsorption and mobility
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H4 H = The US ARS pesticide properties database. Dataset is no longer available. 4 = Verified data
Moderately mobile
150
Best available data
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4.07
Calculated
High leachability
1.44 X 1000
Calculated
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Medium
Calculated
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Moderately mobile
Calculated
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75
Q2 Q = Miscellaneous data from online sources 2 = Unverified data of unknown source
Estimated
Low potential
Not available
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None
Terrestrial ecotoxicology
> 1053
Rat
Moderate
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-
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> 5000
Anas platyrhynchos
Low
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> 110
Low
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-
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-
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-
-
-
-
-
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-
-
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-
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> 100
Lepomis macrochirus
Low
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-
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> 106
Daphnia magna
Low
-
-
-
-
-
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> 0.02
P3 P = Other non-EU, UK or US Governments and Regulators 3 = Unverified data of known source
Pseudokirchneriella subcapitata
High
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-
-
-
-
-
-
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> 63
Dunaliella tertiolecta
Low
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-
-
-
-
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HUMAN HEALTH AND PROTECTION
High (class III)
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> 1053
Rat
Moderate
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EU MRL pesticide database 
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Carcinogen
Endocrine disruptor
?Possibly, status not identified
A0 A = Chromosome aberration (EFSA database) 0 = No data
; B0 B = DNA damage/repair (EFSA database) 0 = No data
; C3 C = Gene mutation (EFSA database) 3 = Negative
; D0 D = Genome mutation (EFSA database) 0 = No data
; E0 E = Unspecified genotoxicity type (miscellaneous data source) 0 = No data
No data found
Reproduction / development effects
Acetyl cholinesterase inhibitor
Neurotoxicant
No data found
XNo, known not to cause a problem
No data found
Respiratory tract irritant
Skin irritant
Skin sensitiser
✓Yes, known to cause a problem
✓Yes, known to cause a problem
No data found
Eye irritant
Phototoxicant
 
✓Yes, known to cause a problem
No data found
 
Harmful if swallowed IARC Group 3 carcinogen - not classifiable; CLP data - suspected carcingen
No information available
Health: H302, H351 Environment: H400, H410
Not classified: Obsolete (Not classified: Obsolete)
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monuron
monuron
Monuron
monuron
monuron
monuron
monuron
monuron
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monuron
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Record last updated:
11/09/2023
Contact:
aeru@herts.ac.uk
Please cite as:
Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal , 22 (4), 1050-1064. DOI: 10.1080/10807039.2015.1133242