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chlorimuron-ethyl (Ref: DPX F6025)
** chlorimuron ethyl ester ** HSDB 6850 ** Translations

Environmental Fate - Ecotoxicology - Human Health - A to Z Index - Home

SUMMARY

Chlorimuron-ethyl is a post-emergence, foliar applied herbicide without EU regulatory approval for use. It has a high aqueous solubility, is non-volatile and, based on its chemical properties, is mobile and can be expected to leach to groundwater. It can be moderately persistent in soil systems but will not usually persist in aquatic systems. It is generally susceptible to hydrolysis. It has a low mammalian toxicity and has a high potential to bioaccumulate. It is relatively non- toxic to most aquatic species, birds and earthworms but moderately toxic to honey bees.

GENERAL INFORMATION Click here for an explantaion of the general chemical status information
for chlorimuron-ethyl

Description: Post-emergence, foliar applied herbicide used to control broad-leaved weeds in a range of crops including peanuts and soya beans.

Example pests controlled: Ragweed; Pigweed; Velvetleaf; Dandelion; Yellow nutsedge; Bittercress; Deadnettle; Lambsquarters; Thistles; Pennycress

Example applications: Soybeans; Peanuts

Efficacy & activity: -

Availability status: Unknown

Introduction & key dates: 1986

EC Regulation 1107/2009 (repealing 91/414):
Status Not approved
Dossier rapporteur/co-rapporteur Not applicable
Date inclusion expires Not applicable
EU Candidate for substitution (CfS) Not applicable
Listed in EU database Yes

Approved for use () or known to be used () in the following European countries: Click to access a note on the approvals information on this site

AT

BE

BG

CY

CZ

DE

DK

EE

EL

ES

FI

FR

HR

HU

IE

IT

LT

LU

LV

MT

NL

PL

PT

RO

SE

SI

SK

UK

Chemical structure: Click here for further information on the general chemical status information used on this site
Isomerism -
Chemical formula C15H15ClN4O6S
Canonical SMILES CCOC(=O)C1=CC=CC=C1S(=O)(=O)NC(=O)NC2=NC(=CC(=N2)Cl)OC
Isomeric SMILES No data
International Chemical Identifier key (InChIKey) NSWAMPCUPHPTTC-UHFFFAOYSA-N
International Chemical Identifier (InChI) InChI=1S/C15H15ClN4O6S/c1-3-26-13(21)9-6-4-5-7-10(9)27(23,24)20-15(22)19-14-17-11(16)8-12(18-14)25-2/h4-8H,3H2,1-2H3,(H2,17,18,19,20,22)
2D structure diagram/image available? Yes

Click to access the Cambridge Crystallographic Data Centre (CCDC) website
Cambridge Crystallographic Data Centre diagrams:
Common Name Relationship Link
Chlorimuron-ethyl - Click here for the CCDC structure diagram

General status: Click here for further information on the general chemical status information used on this site
Pesticide type Herbicide
Substance group Sulfonylurea
Minimum active substance purity 95%
Known relevant impurities -
Substance origin Synthetic
Mode of action Inhibits plant amino acid synthesis - acetohydroxyacid synthase AHAS
CAS RN 90982-32-4
EC number -
CIPAC number None allocated
US EPA chemical code 128901
PubChem CID 56160
Molecular mass (g mol-1) 414.82
PIN (Preferred Identification Name) ethyl 2-{[(4-chloro-6-methoxypyrimidin-2-yl)carbamoyl]sulfamoyl}benzoate
IUPAC name ethyl 2-(4-chloro-6-methoxypyrimidin-2-ylcarbamoylsulfamoyl)benzoate
CAS name ethyl 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoate
Other status information -
Relevant Environmental Water Quality Standards -
Herbicide Resistance Classification (HRAC) B
Herbicide Resistance Classification (WSSA) 2
Insecticide Resistance Classification (IRAC) Not applicable
Fungicide Resistance Classification (FRAC) Not applicable
Examples of recorded resistance Amaranthus hybridus
Amaranthus powellii
Physical state Colourless to off-white crystals
Related substances & organisms

Formulations:
Property Click here for information on the general product and branding information used on this site Value
Example manufacturers & suppliers of products using this active now or historically
  • AgroCare
  • DuPont
  • Cheminova
  • FCC
  • United Phosphorus
Example products using this active
  • Darban
  • Twister
  • Classic
  • Pilarclas
  • Sponsor
UK LERAP status No UK approval for use as a pesticide under EC Regulation 1107/2009
Formulation and application details Usually supplied as a flowable dry powder and used as an aqueous spray post-emergence.


ENVIRONMENTAL FATE

for chlorimuron-ethyl

Property Click here for information on the parameters used to describe environmental fate on this site Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with fate data Interpretation Click here for information on the way in which we interpret environmental fate data
Solubility - In water at 20oC (mg l-1) 1200 L3 High
Solubility - In organic solvents at 20oC (mg l-1) 70500 H3 - Acetone -
8150 H3 - Benzene -
60 H3 - n-Hexane -
2830 H3 - Xylene -
Melting point (oC) 181 L3 -
Boiling point (oC) - - -
Degradation point (oC) - - -
Flashpoint (oC) - - -
Octanol-water partition coefficient at pH 7, 20oC P 1.29 X 1000 Calculated -
Log P 0.11 L3 Low
Bulk density (g ml-1)/Specific gravity 1.51 L3 -
Dissociation constant (pKa) at 25oC 4.2 DW4 -
Note: Weak acid
Vapour pressure at 20oC (mPa) 4.9 X 10-07 L3 Low volatility
Henry's law constant at 25oC (Pa m3 mol-1) 1.7 X 10-10 L3 Non-volatile
GUS leaching potential index Click here for a note on the limitations of the GUS index 3.16 Calculated High leachability
SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate Click here for a note on the limitations of the SCI-GROW index Value 3.55 X 10-01 Calculated -
Note -
Potential for particle bound transport index Click here for a note on the limitations of the potential for particle bound transport index - Calculated Low
Maximum UV-vis absorption L mol-1 cm-1 - - -
Surface tension (mN m-1) - - -

Degradation:
Property Click here for information on the parameters used to describe substance degradation Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with degradation data Interpretation Click here for information on the way in which we interpret substance degradation data
General biodegradability -
Soil degradation (days) (aerobic) DT50 (typical) 40 F3 Moderately persistent
DT50 (lab at 20oC) - - -
DT50 (field) 28 R4 Non-persistent
DT90 (lab at 20oC) - - -
DT90 (field) - - -
DT50 modelling endpoint - - -
Note Literature studies give field DT50 14-42 days; Degradation takes longer at higher pH.
Dissipation rate RL50 on plant matrix Value 4.7 R3 -
Note Wheat straw, n=1
Dissipation rate RL50 on and in plant matrix Value - - -
Note -
Aqueous photolysis DT50 (days) at pH 7 Value - - -
Note -
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value 21 L2 Non-persistent
Note -
Water-sediment DT50 (days) - - -
Water phase only DT50 (days) - - -

Soil adsorption and mobility:
Property Click here for information on the parameters used to describe substance adsorption and mobility Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with adsorption and mobility data Interpretation Click here for information on the way in which we interpret substance adsorption and mobility
Linear Kd - R4 Moderately mobile
Koc 106
Notes and range -
Freundlich Kf - - -
Kfoc -
1/n -
Notes and range -
pH sensitivity -


ECOTOXICOLOGY

for chlorimuron-ethyl

Property Click here for information on the parameters used to describe substance ecotoxicology Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with ecotoxicology data Interpretation Click here for information on the way in which we interpret substance ecotoxicology
Bio-concentration factor BCF (l kg-1) Low risk Q3 Based on LogP < 3 Low potential
CT50 (days) - -
Mammals - Acute oral LD50 (mg kg-1) > 4102 L3 Rat Low
Mammals - Short term dietary NOEL (mg kg-1) - L3 Dog -
(ppm diet) 250 -
Birds - Acute LD50 (mg kg-1) > 5620 F4 Anas platyrhynchos Low
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) > 8.4 F4 Oncorhynchus mykiss Moderate
Fish - Chronic 21 day NOEC (mg l-1) - - -
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) > 10 F4 Daphnia magna Moderate
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) - - -
Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) - - -
Sediment dwelling organisms - Acute 96 hour LC50 (mg l-1) - - -
Sediment dwelling organisms - Chronic 28 day NOEC, static, water (mg l-1) - - -
Sediment dwelling organisms - Chronic 28 day NOEC, sediment (mg kg-1) - - -
Aquatic plants - Acute 7 day EC50, biomass (mg l-1) 0.00045 L3 Lemna gibba High
Non-target plants - - -
- - -
Algae - Acute 72 hour EC50, growth (mg l-1) - - -
Algae - Chronic 96 hour NOEC, growth (mg l-1) - - -
Honeybees Contact acute 48 hour LD50 (μg bee-1) 12.5 F4 Moderate
Oral acute 48 hour LD50 (μg bee-1) - - -
Unknown mode acute 48 hour LD50 (μg bee-1) - - -
Earthworms - Acute 14 day LC50 (mg kg-1) 4050 L3 Eisenia foetida Low
Earthworms - Chronic 14 day NOEC, reproduction (mg kg-1) - - -
Other soil macro-organisms - e.g. Collembola LR50 / EC50 / NOEC / % Effect - - -
Other arthropod (1) LR50 g ha-1 - - -
% Effect - - -
Other arthropod (2) LR50 g ha-1 - - -
% Effect - - -
Soil micro-organisms - - -
Mesocosm study data NOEAEC mg l-1 - - -
NOEAEC mg l-1 - - -


HUMAN HEALTH AND PROTECTION

for chlorimuron-ethyl

General:
Property Click here for information on the parameters used to describe human health and protection issues Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with human health and protection data Interpretation Click here for information on the way in which we interpret human health and protection data
Threshold of Toxicological Concern (Cramer Class) Click here for a note on the limitations of the Cramer class High (class III) - -
Mammals - Acute oral LD50 (mg kg-1) > 4102 L3 Rat Low
Mammals - Dermal LD50 (mg kg-1 body weight) > 2000 L3 Rabbit -
Mammals - Inhalation LC50 (mg l-1) > 5.0 E3 Rat, 4 hr -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) 0.02 L3 -
ARfD - Acute Reference Dose (mg kg-1bw day-1) - - -
AAOEL - Acute Acceptable Operator Exposure Level (mg kg-1 bw day-1) - - -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) - - -
Dermal penetration studies (%) - - -
Dangerous Substances Directive 76/464 - - -
Exposure Limits - - -
Exposure Routes Public -
Occupational Occupational exposure may occur through dermal contact
European MRLs Click here for the EU MRL pesticide database
Drinking Water Standards - - -
Drinking Water MAC (μg l-1) - - -

Health issues:
Carcinogen Mutagen Endocrine disrupter Reproduction / development effects Cholinesterase inhibitor Neurotoxicant

-

-

Respiratory tract irritant Skin irritant Skin sensitiser Eye irritant Phototoxicant

-

-

-

General human health issues Slightly toxic
Possible liver toxicant

: Yes, known to cause a problem
: No, known not to cause a problem
: Possibly, status not identified
- : No data found

Handling issues:
Property Click here for information on the parameters used to describe substance handling issues Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with data on handling issues Interpretation Click here for information on the way in which we interpret data on handling issues
General Click here for a description of the International Maritime Dangerous Goods (IMDG) codes Highly flammable
CLP classification 2013 Handling: H225
Health: H319, H336
EC Risk Classification Click here to view information omn the EU risk phrases Xi - Irritant: R36
H - Handling risks: R11, R67
EC Safety Classification Click here to view information omn the EU safety phrases S2, S9, S26/59, S46
WHO Classification III - Slightly hazardous
US EPA Classification (formulation) III - Caution - Slightly toxic
UN Number -
Waste disposal & packaging Click here for a description of UN packaging marks -


TRANSLATIONS

for chlorimuron-ethyl

Language Name
English chlorimuron-ethyl
French -
German -
Danish -
Italian -
Spanish clorimuron etil
Greek -
Slovenian -
Polish chlorimuron etylowy
Swedish -
Hungarian -
Dutch -

Record last updated: Wednesday 31 October 2018
Contact: aeru@herts.ac.uk