| barban (Ref: A-980) |
 |
Environmental Fate - Ecotoxicology - Human Health - A to Z Index - Home
SUMMARY
Barban is a post-emergence carbonate herbicide that does not have EU approval for use. 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. GENERAL INFORMATION 
for barban
Description: 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
Availability status: Obsolete
Introduction & key dates: 1958, first reported
EC Regulation 1107/2009 (repealing 91/414):
| Status | Not approved |
| Dossier rapporteur/co-rapporteur | - |
| Date inclusion expires | Expired |
Approved for use (
) or known to be used (
) in the following European countries: 
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 |
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General status:
| Pesticide type | Herbicide | |||
| Substance group | Carbamate | |||
| Minimum active substance purity | - | |||
| Known relevant impurities | - | |||
| Substance origin | Synthetic | |||
| Mode of action | Herbicidal action is due to anti-mitotic effects, reducing plant cellular division and so retarding shoot growth | |||
| CAS RN | 101-27-9 | |||
| EC number | 202-930-4 | |||
| CIPAC number | 134 | |||
| US EPA chemical code | 017601 | |||
| Chiral molecule | No | |||
| Chemical formula | C11H9Cl2NO2 | |||
| SMILES | Clc1cc(NC(=O)OCC#CCCl)ccc1 | |||
| 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) | |||
| Structure diagram/image available? | Yes | |||
| Molecular mass (g mol-1) | 258.10 | |||
| PIN (Preferred Identification Name) | 4-chlorobut-2-yn-1-yl (3-chlorophenyl)carbamate | |||
| IUPAC name | 4-chlorobut-2-ynyl 3-chlorocarbanilate | |||
| CAS name | 4-chloro-2-butynyl (3-chlorophenyl)carbamate | |||
| Other status information | - | |||
| Herbicide Resistance Classification (HRAC) | Not known | |||
| Herbicide Resistance Classification (WSSA) | - | |||
| Insecticide Resistance Classification (IRAC) | Not applicable | |||
| Fungicide Resistance Classification (FRAC) | Not applicable | |||
| Examples of recorded resistance | - | |||
| Physical state | Solid | |||
| Related substances & organisms | - | |||
Formulations:
| Property |
Value | |||
| Example manufacturers & suppliers of products using this active now or historically |
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| Example products using this active |
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| UK LERAP status | No UK approval for use or outside scope | |||
| Formulation and application details | No longer available. | |||
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Solubility - In water at 20oC (mg l-1) | 11.0 | F3 | Low | |
| Solubility - In organic solvents at 20oC (mg l-1) | 327000 | R3 - Benzene | - | |
| 113000 | R3 - n-Butylbenzene | - | ||
| 257000 | R3 - Toluene | - | ||
| 279000 | R3 - Xylene | - | ||
| Melting point (oC) | 75 | F3 | - | |
| Boiling point (oC) | - | - | - | |
| Degradation point (oC) | 224 | F3 | - | |
| Flashpoint (oC) | - | - | - | |
| Octanol-water partition coefficient at pH 7, 20oC | P | 2.57 X 1003 | Calculated | - |
| Log P | 3.41 | V3 | High | |
| Bulk density (g ml-1)/Specific gravity | 1.39 | V3 | - | |
| Dissociation constant (pKa) at 25oC | - | - | - | |
| Note: | ||||
| Vapour pressure at 25oC (mPa) | 0.05 | H3 | Low volatility | |
| Henry's law constant at 25oC (Pa m3 mol-1) | 1.17 X 10-03 | H3 | Non-volatile | |
| Henry's law constant at 20oC (dimensionless) | 4.82 X 10-07 | Calculated | Moderately volatile | |
GUS leaching potential index  |
0.70 | Calculated | Low leachability | |
| SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate |
Value | 3.67 X 10-03 | Calculated | - |
| Note | - | |||
| Potential for particle bound transport index |
- | Calculated | Medium | |
| Maximum UV-vis absorption L mol-1 cm-1 | - | - | - | |
| Surface tension (mN m-1) | - | - | - | |
Degradation:
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Soil degradation (days) (aerobic) | DT50 (typical) | 5 | F3 | Non-persistent |
| DT50 (lab at 20oC) | - | - | - | |
| DT50 (field) | 9.5 | F3 | Non-persistent | |
| DT90 (lab at 20oC) | - | - | - | |
| DT90 (field) | - | - | - | |
| Note | Field studies literature values DT50 range 4-15 days; Other general literature 1-60 days | |||
| Plant matrix DT50 (days) | Value | 2 | F2 | - |
| Note | Estimate | |||
| Aqueous photolysis DT50 (days) at pH 7 | Value | - | - | - |
| Note | - | |||
| Aqueous hydrolysis DT50 (days) at 20oC and pH 7 | Value | 0.05 | R4 | Non-persistent |
| Note | pH sensitive: 1.1 hours at pH7, 7 mins at pH8 | |||
| Water-sediment DT50 (days) | - | - | - | |
| Water phase only DT50 (days) | - | - | - | |
Soil adsorption and mobility:
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Linear | Kd | - | F3 | Slightly mobile |
| Koc | 1000 | |||
| Notes and range | Other sources: Koc 1200 mL/g estimate (CA2) | |||
| Freundlich | Kf | - | - | - |
| Kfoc | - | |||
| 1/n | - | |||
| Notes and range | - | |||
| pH sensitivity | - | |||
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Bio-concentration factor | BCF (l kg-1) | 2.2 | Q3 | Low potential |
| CT50 (days) | Not available | - | ||
| Mammals - Acute oral LD50 (mg kg-1) | 527 | V3 Rat | Moderate | |
| Mammals - Short term dietary NOEL | (mg kg-1) | - | - | - |
| (ppm diet) | - | - | ||
| Birds - Acute LD50 (mg kg-1) | - | - | - | |
| Birds - Short term dietary (LC50/LD50) | - | - | - | |
| Fish - Acute 96 hour LC50 (mg l-1) | 0.53 | J3 Cyprinus carpio | Moderate | |
| Fish - Chronic 21 day NOEC (mg l-1) | - | - | - | |
| Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) | 0.30 | 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) | - | - | - | |
| Non-target plants | - | - | - | |
| - | - | - | ||
| Algae - Acute 72 hour EC50, growth (mg l-1) | 10.0 | F3 Chlorella pyrenoidosa | Moderate | |
| Algae - Chronic 96 hour NOEC, growth (mg l-1) | - | - | - | |
| Honeybees | Contact acute 48 hour LD50 (μg bee-1) | - | - | - |
| 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) | - | - | - | |
| 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 barban
General:
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Threshold of Toxicological Concern (Cramer Class) |
High (class III) | - | - | |
| Mammals - Acute oral LD50 (mg kg-1) | 527 | V3 Rat | Moderate | |
| Mammals - Dermal LD50 (mg kg-1 body weight) | > 1600 | V3 Rabbit | - | |
| Mammals - Inhalation LC50 (mg l-1) | 27.4 | V3 Rabbit, 4 hr | - | |
| Other Mammal toxicity endpoints | - | - | ||
| ADI - Acceptable Daily Intake (mg kg-1bw day-1) | - | - | - | |
| ARfD - Acute Reference Dose (mg kg-1bw 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 | General population exposure should be low or non-existent since barban is no longer produced or used | ||
| Occupational | Occupational exposure should be low or non-existent since barban is no longer produced or used | |||
| European MRLs | Click here for the EU MRL pesticide database | |||
| Drinking Water MAC (μg l-1) | - | - | - | |
Health issues:
| Carcinogen | Mutagen | Endocrine disrupter | Reproduction / development effects | Cholinesterase inhibitor | Neurotoxicant | |||
- |
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| Respiratory tract irritant | Skin irritant | Skin sensitiser | Eye irritant | Phototoxicant | ||||
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| General human health issues | May cause contact dermatitis Potential immunosuppressant |
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: Yes, known to cause a problem
: No, known not to cause a problem
: Possibly, status not identified
- : No data found
Handling issues:
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| General |
No information available | |||
| CLP classification 2013 | - | |||
| EC Risk Classification |
Xn - Harmful: R22, R43 N - Dangerous for the environment: R50, R53 |
|||
| EC Safety Classification |
S2, S24, S36/37, S60, S61 | |||
| WHO Classification | O | - | Obsolete substance | |
| US EPA Classification (formulation) | [Health: H302, H317], [Environment: H400, H410] | - | -, -, -, - | |
| UN Number | - | |||
| Waste disposal & packaging |
- | |||
| Language | Name |
| English | barban |
| French | barbane |
| German | Barban |
| Danish | - |
| Italian | - |
| Spanish | Barban |
| Greek | - |
| Slovenian | - |
| Polish | barban |
| Swedish | - |
| Hungarian | - |
| Dutch | - |
Record last updated: Monday 15 August 2016
Contact: aeru@herts.ac.uk