Benoxacor (Ref: CGA 154281)-Pesticide database

Insecticides Herbicides Fungicides Other related substances Industry news Contact us

Benoxacor (Ref: CGA 154281)

(Also known as: C10964)

Benoxacor is a herbicide safener used with metalochlor. It has a low aqueous solubility, is quite volatile and, based on its chemical properties, has a high potential for leaching to groundwater. It is moderately persistent in soil systems but tends not to persist in water. It has a low mammalian toxicity and a high potential for bioaccumulation. It is moderately toxic to birds, honeybees, earthworms and most aquatic organisms.

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
Environmental fate High alert: GUS: High leachability Warning: Significant data are missing	Ecotoxicity Moderate alert: Birds acute ecotoxicity: Moderate; Fish acute ecotoxicity: Moderate; Daphnia acute ecotoxicity: Moderate; Bees acute oral ecotoxicity: Moderate; Earthworms acute ecotoxicity: Moderate	Human health Low alert Warning: Significant data are missing

GENERAL INFORMATION

A herbicide safener used to increase the tolerance of maize to metolachlor

Availability status

Introduction & key dates

UK regulatory status

UK COPR regulatory status

Date COPR inclusion expires

UK LERAP status

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

A chiral molecule

Chemical formula

C₁₁H₁₁Cl₂NO₂

Canonical SMILES

CC1COC2=CC=CC=C2N1C(=O)C(Cl)Cl

Isomeric SMILES

International Chemical Identifier key (InChIKey)

PFJJMJDEVDLPNE-UHFFFAOYSA-N

International Chemical Identifier (InChI)

InChI=1S/C11H11Cl2NO2/c1-7-6-16-9-5-3-2-4-8(9)14(7)11(15)10(12)13/h2-5,7,10H,6H2,1H3

2D structure diagram/image available?

Cambridge Crystallographic Data Centre diagrams

Common Name	Relationship	Link
benoxacor	Isomer mix
benoxacor	S-Isomer

Other substance

Other constituent type

Herbicide safener

Substance groups

Minimum active substance purity

Known relevant impurities

Substance origin

Accelerates the detoxification of metalochlor. Has no herbicide activity of its own.

US EPA chemical code

PIN (Preferred Identification Name)

rac-(3R)-4-(dichloroacetyl)-3-methyl-3,4-dihydro-2H-1,4-benzoxazine

(RS)-4-dichloroacetyl-3,4-dihydro-3-methyl-2H-1,4-benzoxazine

4-(dichloroacetyl)-3,4-dihydro-3-methyl-2H-1,4-benzoxazine

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

Colourless solid

Related substances & organisms

S-metolachlor

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

Syngenta

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

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

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

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

Dichloromethane

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

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

Melting point (°C)

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

Boiling point (°C)

Degradation point (°C)

Flashpoint (°C)

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

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

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

Fat solubility of residues

Density (g ml⁻¹)

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

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

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

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

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)

W4 W = French database provided by ARVALIS-Institut du Végétal. Dataset no longer available.
4 = Verified data

Moderately persistent

DT₅₀ (lab at 20 °C)

DT₅₀ (field)

DT₉₀ (lab at 20 °C)

DT₉₀ (field)

DT₅₀ modelling endpoint

Best available data

Dissipation rate RL₅₀ on plant matrix

Dissipation rate RL₅₀ on and in plant matrix

Aqueous photolysis DT₅₀ (days) at pH 7

C4 C = AGRITOX dataset. Dataset is no longer available.
4 = Verified data

Moderately fast

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

C3 C = AGRITOX dataset. Dataset is no longer available.
3 = Unverified data of known source

Water-sediment DT₅₀ (days)

Water phase only DT₅₀ (days)

Soil adsorption and mobility

Source; quality score; and other information

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

Moderately mobile

Notes and range

Best available data

Notes and range

Source; quality score; and other information

GUS leaching potential index

High leachability

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

Potential for particle bound transport index

Potential for loss via drain flow

Moderately mobile

Bio-concentration factor

BCF (l kg⁻¹)

Q3 Q = Miscellaneous data from online sources
3 = Unverified data of known source

Based on LogP < 3

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

Mammals - Short term dietary NOEL

L2 L = Pesticide manuals and hard copy reference books / other sources
2 = Unverified data of unknown source

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

Birds - Acute LD₅₀ (mg kg⁻¹)

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

Anas platyrhynchos

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

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)

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

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

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)

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

Lepomis macrochirus

Fish - Chronic 21 day NOEC (mg l⁻¹)

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

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

Daphnia magna

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)

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

Scenedesmus subspicatus

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

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

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

Mammals - Inhalation LC₅₀ (mg l⁻¹)

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

Other Mammal toxicity endpoints

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

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

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

A3 A = Chromosome aberration (EFSA database)
3 = Negative

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

XNo, known not to cause a problem

Respiratory tract irritant

Skin sensitiser

✓Yes, known to cause a problem

✓Yes, known to cause a problem

XNo, known not to cause a problem

General human health issues

No further information available

Handling issues

Value and interpretation

No information available

CLP classification 2013

Not classified: Obsolete

WHO Classification

U (Unlikely to present an acute hazard)

Waste disposal & packaging

Shelf-life, storage, stability and reactivity

Copyright © 2023 All Rights Reserved