Dimefuron (Ref: RP 23465)
Last updated: 15/01/2023
(Not known by any other names)
Dimefuron is a herbicide used for the control of annual broad-leaved weeds. It has a low aqueous solubility and a low volatility. It may be persistent in soil and aquatic systems depending on local conditions. Based on its physico-chemical properties it has potential to leach to groundwater. It is highly toxic to algae, moderately toxic to earthworms but appears to be less toxic to other oransisms for which data is available. Dimefuron has a low oral mammalian toxicity.
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 applied pre- and post-emergence to control annual broad-leaved weeds
Chickweed; Scented mayweed; Charlock
Legumes including peas, beans; Lucerne; Oilseed rape; Cruciferous vegetables
-
-
circa 1975
Not approved
Expired
No UK approval for use
EC Regulation 1107/2009 (repealing 91/414)
Not approved
Not applicable
Expired
-
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
 
 
 
 
 
 
 
 
 
None
C₁₅H₁₉ClN₄O₃
CC(C)(C)C1=NN(C(=O)O1)C2=C(C=C(C=C2)NC(=O)N(C)C)Cl
No data
DHWRNDJOGMTCPB-UHFFFAOYSA-N
InChI=1S/C15H19ClN4O3/c1-15(2,3)12-18-20(14(22)23-12)11-7-6-9(8-10(11)16)17-13(21)19(4)5/h6-8H,1-5H3,(H,17,21)
Yes
Herbicide
Oxadiazolone herbicide; Phenylurea herbicide
-
-
Synthetic
Selective, absorbed mainly through the roots. Photosystem II inhibitor.
34205-21-5
251-879-4
279
-
91612
No data found
338.79
N'-[4-(5-tert-butyl-2-oxo-1,3,4-oxadiazol-3(2H)-yl)-3-chlorophenyl]-N,N-dimethylurea
3-[4-(5-tert-butyl-2,3-dihydro-2-oxo-1,3,4-oxadiazol-3-yl)-3-chlorophenyl]-1,1-dimethylurea
N'-[3-chloro-4-[5-(1,1-dimethylethyl)-2-oxo-1,3,4-oxadiazol-3(2H)-yl]phenyl]-N,N-dimethylurea
PAN Listed as Highly Hazardous Chemical
-
C2
7
Not applicable
Not applicable
-
Colourless crystals
16
Low
-
-
-
193
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
-
-
-
-
-
-
-
-
-
-
3.24 X 1002
Calculated
-
2.51
Low
-
-
-
-
-
-
1.3
Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown source
-
Not applicable
-
No dissociation
0.01
Low volatility
2.12 X 10-03
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Non-volatile
-
-
-
-
-
-
-
65
Moderately persistent
129
Persistent
-
-
-
-
-
-
-
-
-
-
-
-
Lab studies DT₅₀ range 100-203 days
-
-
-
-
-
-
-
-
-
-
-
-
226
Persistent
-
97
Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source
Moderately fast
82
Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source
Stable
Soil adsorption and mobility
-
-
-
-
-
2.54
Moderately mobile
206
0.91
-
-
3.56
Calculated
High leachability
7.07 X 10-01
Calculated
-
-
Medium
Calculated
-
Moderately mobile
Calculated
-
Low risk
Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source
Based on LogP < 3
Low risk
-
-
None
Terrestrial ecotoxicology
> 2000
Rat
Low
15.5
Rat
High
250
-
-
-
-
3350
Colinus virginianus
Low
-
-
-
-
-
-
300
Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source
Moderate
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
500
Low
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1000
Lepomis macrochirus
Low
-
-
-
575
K3 K = Research datasets, e.g. Pandora, Demetra 3 = Unverified data of known source
Unknown species
Low
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.008
K2 K = Research datasets, e.g. Pandora, Demetra 2 = Unverified data of unknown source
Unknown species
High
-
-
-
-
-
-
-
-
-
HUMAN HEALTH AND PROTECTION
High (class III)
-
-
> 2000
Rat
Low
2000
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Rat
-
-
-
-
-
-
-
0.07
UK ACP 1999
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
EU MRL pesticide database 
-
-
-
-
-
-
-
-
-
-
Carcinogen
Endocrine disruptor
No data found
A3 A = Chromosome aberration (EFSA database) 3 = Negative
; B3 B = DNA damage/repair (EFSA database) 3 = Negative
; 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
No data found
No data found
No data found
Eye irritant
Phototoxicant
 
No data found
No data found
 
No further information avilable
No information avilable
Health: H302
III (Slightly hazardous)
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-
dimefuron
diméfuron
Dimefuron
dimefuron
dimefuron
dimefuron
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dimefuron
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Record last updated:
15/01/2023
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