Chlorimuron-Pesticide database

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(Not known by any other names)

Chlorimuron is a post-emergence herbicide that is usually used as the ethyl variant. Little data is available regarding its environmental fate, ecotoxicology or impacts on human health.

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
	Ecotoxicity Moderate alert: Fish acute ecotoxicity: Moderate; Daphnia acute ecotoxicity: Moderate; Bees acute contact ecotoxicity: Moderate	Human health Low alert Warning: Significant data are missing

GENERAL INFORMATION

Post-emergence, foliar applied herbicide, usually applied as the ethyl variant, 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

Introduction & key dates

UK regulatory status

UK COPR regulatory status

Date COPR inclusion expires

UK LERAP status

No UK approval for use

EC Regulation 1107/2009 (repealing 91/414)

EC Regulation 1107/2009 status

Dossier rapporteur/co-rapporteur

Date EC 1107/2009 inclusion expires

EU Candidate for substitution (CfS)

Listed in EU database

Approved for use (✓) under EC 1107/2009 in the following EU Member States

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

Approved for use (✓) under EC 1107/2009 by Mutual Recognition of Authorisation and/or national regulations in the following EEA countries

ISIceland	NONorway

Additional information

Chemical structure

Chemical formula

C₁₃H₁₁ClN₄O₆S

Canonical SMILES

COC1=CC(=NC(=N1)NC(=O)NS(=O)(=O)C2=CC=CC=C2C(=O)O)Cl

Isomeric SMILES

International Chemical Identifier key (InChIKey)

RIUXZHMCCFLRBI-UHFFFAOYSA-N

International Chemical Identifier (InChI)

InChI=1S/C13H11ClN4O6S/c1-24-10-6-9(14)15-12(16-10)17-13(21)18-25(22,23)8-5-3-2-4-7(8)11(19)20/h2-6H,1H3,(H,19,20)(H2,15,16,17,18,21)

2D structure diagram/image available?

Cambridge Crystallographic Data Centre diagrams

Common Name	Relationship	Link
chlorimuron-ethyl	Variant

Substance groups

Sulfonylurea herbicide; Pyrimidinylsulfonylurea herbicide

Minimum active substance purity

Known relevant impurities

Substance origin

Inhibits plant amino acid synthesis - acetohydroxyacid synthase AHAS

US EPA chemical code

CLP index number

PIN (Preferred Identification Name)

2-([(4-chloro-6-methoxypyrimidin-2-yl)carbamoyl]sulfamoyl)benzoic acid

2-(4-chloro-6-methoxypyrimidin-2-ylcarbamoylsulfamoyl)benzoic acid

2-(((((4-chloro-6-methoxy-2-pyrimidinyl)amino)carbonyl)amino)sulfonyl)benzoic acid

Other status information

Relevant Environmental Water Quality Standards

Herbicide Resistance Classification (HRAC)

Herbicide Resistance Classification (WSSA)

Insecticide Resistance Classification (IRAC)

Fungicide Resistance Classification (FRAC)

Examples of recorded resistance

Related substances & organisms

chlorimuron-ethyl

Example manufacturers & suppliers of products using this active now or historically

Example products using this active

Formulation and application details

ENVIRONMENTAL FATE

Source; quality score; and other information

Solubility - In water at 20 °C (mg l⁻¹)

L3 L = Pesticide manuals and hard copy reference books / other sources
3 = Unverified data of known source

as ethyl variant

Solubility - In organic solvents at 20 °C (mg l⁻¹)

Melting point (°C)

Boiling point (°C)

Degradation point (°C)

Flashpoint (°C)

Octanol-water partition coefficient at pH 7, 20 °C

1.29 X 10⁰⁰

L3 L = Pesticide manuals and hard copy reference books / other sources
3 = Unverified data of known source

as ethyl variant

Fat solubility of residues

Density (g ml⁻¹)

Dissociation constant pKa) at 25 °C

Vapour pressure at 20 °C (mPa)

L3 L = Pesticide manuals and hard copy reference books / other sources
3 = Unverified data of known source

as ethyl variant

Henry's law constant at 25 °C (Pa m³ mol⁻¹)

Maximum UV-vis absorption L mol⁻¹ cm⁻¹

Surface tension (mN m⁻¹)

Source; quality score; and other information

General biodegradability

Soil degradation (days) (aerobic)

DT₅₀ (typical)

DT₅₀ (lab at 20 °C)

DT₅₀ (field)

DT₉₀ (lab at 20 °C)

DT₉₀ (field)

DT₅₀ modelling endpoint

Dissipation rate RL₅₀ on plant matrix

Dissipation rate RL₅₀ on and in plant matrix

Aqueous photolysis DT₅₀ (days) at pH 7

Aqueous hydrolysis DT₅₀ (days) at 20 °C and pH 7

Water-sediment DT₅₀ (days)

Water phase only DT₅₀ (days)

Soil adsorption and mobility

Source; quality score; and other information

Notes and range

Notes and range

Source; quality score; and other information

GUS leaching potential index

SCI-GROW groundwater index (μg l⁻¹) for a 1 kg ha⁻¹ or 1 l ha⁻¹ application rate

Cannot be calculated

Potential for particle bound transport index

Potential for loss via drain flow

Bio-concentration factor

BCF (l kg⁻¹)

CT₅₀ (days)

Known metabolites

None

Terrestrial ecotoxicology

Source; quality score; and other information

Mammals - Acute oral LD₅₀ (mg kg⁻¹)

L3 L = Pesticide manuals and hard copy reference books / other sources
3 = Unverified data of known source

Rat ss ethyl variant

Mammals - Short term dietary NOEL

Mammals - Chronic 21d NOAEL (mg kg⁻¹ bw d⁻¹)

Birds - Acute LD₅₀ (mg kg⁻¹)

F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment )
3 = Unverified data of known source

Anas platyrhynchos as ethyl variant

Birds - Short term dietary (LC₅₀/LD₅₀)

Birds - Chronic 21d NOEL (mg kg⁻¹ bw d⁻¹)

Earthworms - Acute 14 day LC₅₀ (mg kg⁻¹)

L3 L = Pesticide manuals and hard copy reference books / other sources
3 = Unverified data of known source

Eisenia foetida ss ethyl variant

Earthworms - Chronic NOEC, reproduction (mg kg⁻¹)

Soil micro-organisms

Acute LC₅₀ (mg kg⁻¹)

Chronic NOEC (mg kg⁻¹)

Non-target plants

Honeybees (Apis spp.)

Contact acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)

F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment )
3 = Unverified data of known source

Apis mellifera ss ethyl variant

Oral acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)

Unknown mode acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)

Bumblebees (Bombus spp.)

Contact acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)

Oral acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)

Mason bees (Osmia spp.)

Contact acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)

Oral acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)

Other bee species (1)

Acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg insect⁻¹)

Mode of exposure

Other bee species (2)

Acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg insect⁻¹)

Mode of exposure

Beneficial insects (Ladybirds)

Beneficial insects (Lacewings)

Beneficial insects (Parasitic wasps)

Beneficial insects (Predatory mites)

Beneficial insects (Ground beetles)

Aquatic ecotoxicology

Source; quality score; and other information

Fish - Acute 96 hour LC₅₀ (mg l⁻¹)

F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment )
3 = Unverified data of known source

Oncorhynchus mykiss ss ethyl variant

Fish - Chronic 21 day NOEC (mg l⁻¹)

Aquatic invertebrates - Acute 48 hour EC₅₀ (mg l⁻¹)

F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment )
3 = Unverified data of known source

Daphnia magna ss ethyl variant

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)

Algae - Acute 72 hour EC₅₀, growth (mg l⁻¹)

Algae - Chronic 96 hour NOEC, growth (mg l⁻¹)

Mesocosm study data

NOEAEC mg l⁻¹

NOEAEC mg l⁻¹

HUMAN HEALTH AND PROTECTION

Source; quality score; and other information

Threshold of Toxicological Concern (Cramer Class)

High (class III)

Mammals - Acute oral LD₅₀ (mg kg⁻¹)

L3 L = Pesticide manuals and hard copy reference books / other sources
3 = Unverified data of known source

Rat ss ethyl variant

Mammals - Dermal LD₅₀ (mg kg⁻¹ body weight)

Mammals - Inhalation LC₅₀ (mg l⁻¹)

Other Mammal toxicity endpoints

ADI - Acceptable Daily Intake (mg kg⁻¹ bw day⁻¹)

ARfD - Acute Reference Dose (mg kg⁻¹ bw day⁻¹)

AAOEL - Acute Acceptable Operator Exposure Level (mg kg⁻¹ bw day⁻¹)

AOEL - Acceptable Operator Exposure Level - Systemic (mg kg⁻¹ bw day⁻¹)

Dermal penetration studies (%)

Dangerous Substances Directive 76/464

Exposure Routes

EU MRL pesticide database

GB MRL Register

Drinking Water Standards

Drinking Water MAC (μg l⁻¹)

Mammalian dose elimination route and rate

Specific human health issues

Endocrine disruptor

A0 A = Chromosome aberration (EFSA database)
0 = No data

B0 B = DNA damage/repair (EFSA database)
0 = No data

C0 C = Gene mutation (EFSA database)
0 = No data

D0 D = Genome mutation (EFSA database)
0 = No data

E0 E = Unspecified genotoxicity type (miscellaneous data source)
0 = No data

Reproduction / development effects

Acetyl cholinesterase inhibitor

Respiratory tract irritant

Skin sensitiser

XNo, known not to cause a problem

?Possibly, status not identified

General human health issues

No information available

Handling issues

Value and interpretation

No information available

CLP classification 2013

Health: H319, H336

WHO Classification

III (Slightly hazardous)

Waste disposal & packaging

Shelf-life, storage, stability and reactivity

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