Barban (Ref: A-980)-Pesticide database

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Barban (Ref: A-980)

(Also known as: barbamate; carbyne; carbine; CBN; chlorinate)

Barban is an obsolete post-emergence carbonate herbicide. It has a low aqueous solubility, is volatile and would not normally be expected to leach to groundwater. It is not persistent in soiI systems and is unlikely to be persistent in water systems. It has a moderate mammalian toxicity with a low potential for bioaccumulation. There are gaps in biodiversity toxicity data but it is reported to be moderately toxic to most aquatic species.

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 Moderate alert: Drainflow: Slightly mobile; Potential for particle bound transport: Medium	Ecotoxicity Moderate alert: Fish acute ecotoxicity: Moderate; Daphnia acute ecotoxicity: Moderate Warning: Significant data are missing	Human health Moderate alert: Mammals acute toxicity: Moderate Warning: Significant data are missing

GENERAL INFORMATION

An obsolete, a post-emergent, selective herbicide for control of wild oats and other grasses

Example pests controlled

Wild oats; Canary grass; Italian ryegrass; Blackgrass

Example applications

Cereals, particular barley, wheat; Sugarbeet; Beans & peas; Flax; Lentils; Beet crops including mangolds; Some soft fruit

Efficacy & activity

Availability status

Considered obsolete but may be available in some countries

Introduction & key dates

1958, first reported

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

C₁₁H₉Cl₂NO₂

Canonical SMILES

C1=CC(=CC(=C1)Cl)NC(=O)OCC#CCCl

Isomeric SMILES

International Chemical Identifier key (InChIKey)

MCOQHIWZJUDQIC-UHFFFAOYSA-N

International Chemical Identifier (InChI)

InChI=1S/C11H9Cl2NO2/c12-6-1-2-7-16-11(15)14-10-5-3-4-9(13)8-10/h3-5,8H,6-7H2,(H,14,15)

2D structure diagram/image available?

Substance groups

Carbamate ester herbicide; Carbanilate herbicide

Minimum active substance purity

Known relevant impurities

Substance origin

Herbicidal action is due to anti-mitotic effects, reducing plant cellular division and so retarding shoot growth. Inhibition of microtubule organisation.

US EPA chemical code

CLP index number

PIN (Preferred Identification Name)

4-chlorobut-2-yn-1-yl (3-chlorophenyl)carbamate

4-chlorobut-2-ynyl 3-chlorocarbanilate

4-chloro-2-butynyl (3-chlorophenyl)carbamate

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

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

No longer manufactured

Example products using this active

Neoban
Fisons B25
Carbyne
Dualweed

Formulation and application details

No longer available

ENVIRONMENTAL FATE

Source; quality score; and other information

Solubility - In water at 20 °C (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

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

R3 R = Peer reviewed scientific publications
3 = Unverified data of known source

R3 R = Peer reviewed scientific publications
3 = Unverified data of known source

R3 R = Peer reviewed scientific publications
3 = Unverified data of known source

R3 R = Peer reviewed scientific publications
3 = Unverified data of known source

Melting point (°C)

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

Boiling point (°C)

Degradation point (°C)

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

Flashpoint (°C)

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

V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID )
3 = Unverified data of known source

Fat solubility of residues

A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes

Regulatory data - observed in metabolism and farm animal feeding studies

A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes

Density (g ml⁻¹)

V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID )
3 = Unverified data of known source

Dissociation constant pKa) at 25 °C

Vapour pressure at 20 °C (mPa)

H3 H = The US ARS pesticide properties database. Dataset is no longer available.
3 = Unverified data of known source

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

H3 H = The US ARS pesticide properties database. Dataset is no longer available.
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)

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

DT₅₀ (lab at 20 °C)

DT₅₀ (field)

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

DT₉₀ (lab at 20 °C)

DT₉₀ (field)

DT₅₀ modelling endpoint

Field studies literature values DT₅₀ range 4-15 days; Other general literature 1-60 days

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

R4 R = Peer reviewed scientific publications
4 = Verified data

pH sensitive: 1.1 hours at pH7, 7 mins at pH8

Water-sediment DT₅₀ (days)

Water phase only DT₅₀ (days)

Soil adsorption and mobility

Source; quality score; and other information

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

Slightly mobile

Notes and range

Other sources: K_oc 1200 mL g⁻¹ estimate (CA2)

Notes and range

Source; quality score; and other information

GUS leaching potential index

Low 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

Slightly mobile

Bio-concentration factor

BCF (l kg⁻¹)

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

CT₅₀ (days)

Known metabolites

None

Terrestrial ecotoxicology

Source; quality score; and other information

Mammals - Acute oral LD₅₀ (mg kg⁻¹)

V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID )
3 = Unverified data of known source

Mammals - Short term dietary NOEL

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

Birds - Acute LD₅₀ (mg kg⁻¹)

Birds - Short term dietary (LC₅₀/LD₅₀)

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

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

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)

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)

J3 J = Pesticide Action Network database (click here )
3 = Unverified data of known source

Cyprinus carpio

Fish - Chronic 21 day NOEC (mg l⁻¹)

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

F4 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 )
4 = Verified data

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)

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

Chlorella pyrenoidosa

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)

V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID )
3 = Unverified data of known source

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

V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID )
3 = Unverified data of known source

Mammals - Inhalation LC₅₀ (mg l⁻¹)

V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID )
3 = Unverified data of known source

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

General population exposure should be low or non-existent since barban is no longer produced or used

Occupational exposure should be low or non-existent since barban is no longer produced or used

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

XNo, known not to cause a problem

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

May cause contact dermatitis
Potential immunosuppressant

Handling issues

Value and interpretation

IMDG Transport Hazard Class 6,1

CLP classification 2013

Health: H302, H317
Environment: H400, H410

WHO Classification

Not classified: Obsolete

Waste disposal & packaging

Shelf-life, storage, stability and reactivity

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