Bromoxynil-butanoate |
Last updated: 22/08/2024 |
(Also known as: bromoxynil butyrate) |
SUMMARY |
A herbicide for post-emergence weed control. It has a low aqueous solubility and a low volatility. There is a low potential for leaching to groundwater based on its chemical properties. It is not expected to be persistent in soil or water systems. It is moderately toxic via the oral route to mammals, is an endocrine disrupting chemical and a skin sensitiser. It is highly toxic to fish but less so to other aquatic and terrestrial biodiversity. |
Data alerts |
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 |
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Warning: Significant data are missing |
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An HBN herbicide used for post-emergence control of annual broad-leaved weeds | |
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Ragweed; Smartweed; Nightshade; Kochia; Wild mustard | |
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Alfalfa; Garlic; Corn; Sorghum; Cereals including wheat, barley; Turf; Non-cropped areas including rights-of-way, pathways | |
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Efficacy proven from prolonged use in the EU and from experimental studies | |
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Current | |
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circa 1980, introduced |
UK regulatory status |
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Phasing out | ||
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Expired | ||
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Check label - may vary with formulation |
EC Regulation 1107/2009 (repealing 91/414) |
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Not approved | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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France/Germany | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Expired | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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No | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes (as bromoxynil) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Additional information |
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Australia, Latin America, USA |
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Chemical structure |
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None | |
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C₁₁H₉Br₂NO₂ | |
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CCCC(=O)OC1=C(C=C(C=C1Br)C#N)Br | |
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No data | |
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PGMZYNZXIYOOHJ-UHFFFAOYSA-N | |
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InChI=1S/C11H9Br2NO2/c1-2-3-10(15)16-11-8(12)4-7(6-14)5-9(11)13/h4-5H,2-3H2,1H3 | |
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Yes |
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Common Name | Relationship | Link |
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bromoxynil | Parent |
General status |
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Herbicide | |
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Hydroxybenzonitrile herbicide; Nitrile herbicide | |
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967 g kg⁻¹ | |
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EU dossier - None declared | |
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Synthetic | |
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Select contact action with some systemic activity. Inhibits photosynthesis (photosystem II). | |
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3861-41-4 | |
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223-374-9 | |
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87.403 | |
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035303 | |
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62526 | |
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608-006-00-0 | |
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347.0 | |
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2,6-dibromo-4-cyanophenyl butanoate | |
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2,6-dibromo-4-cyanophenyl butyrate | |
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2,6-dibromo-4-cyanophenyl butanoate | |
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Potential marine pollutant | |
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- | |
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C3 | |
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6 | |
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Not applicable | |
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Not applicable | |
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- | |
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Light beige coloured powdery solid | |
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Formulations |
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Spray application |
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5.4 | 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 |
Low | ||||||||
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70000 | A4 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 ) Ethanol4 = Verified data |
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23000 | 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 ) n-Hexane5 = Verified data used for regulatory purposes |
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600000 | 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 ) Toluene5 = Verified data used for regulatory purposes |
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600000 | 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 ) Acetone5 = Verified data used for regulatory purposes |
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86 | 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 |
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353 | 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 |
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320 | 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 |
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7.24 X 1003 | Calculated | - | |||||||
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3.86 | 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 |
High | ||||||||
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Not applicable | 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 |
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No dissociation | |||||||||||
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0.28 | 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 |
Low volatility. If applied directly to plants, drift is a concern & mitigation is advisable | ||||||||
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1.80 X 10-02 | 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 |
Non-volatile | ||||||||
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In methanol: 213nm= 48122, 283nm=723, 294nm=633 | 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 |
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68.60 | 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 ) at 20 °C 97.6%5 = Verified data used for regulatory purposes |
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Degradation |
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0.58 | 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 |
Non-persistent | |||||||
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0.58 | 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 |
Non-persistent | ||||||||
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1.99 | 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 |
Non-persistent | ||||||||
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EU 2017 dossier lab studies DT₅₀ range 0.5-0.67 days, DT₉₀ range 1.69-2.29 days, Soils =2 | ||||||||||
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0.12 | 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 |
Fast | |||||||
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33 | 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 |
Moderately persistent | |||||||
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DT₅₀: pH 4: 44 days; pH 9: 1.1 days | ||||||||||
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As this parameter is not normally measured directly, a surrogate measure is used: ‘Photochemical oxidative DT₅₀’. Where data is available, this can be found in the Fate Indices section below. | ||||||||||
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Soil adsorption and mobility |
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Fate indices |
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Cannot be calculated | - | - | |||||||||||||||||||||||||
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Low | Calculated | - | ||||||||||||||||||||||||||
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Calculated | - | |||||||||||||||||||||||||||
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Known soil metabolites |
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Major fraction | 0.379 | - | |||||
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Major fraction | 0.150 | - | |||||
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Minor fraction | 0.057 | - |
Known groundwater metabolites |
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Relevant | 0.003 | 18 |
Other known metabolites |
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2,6-dibromohydroquinone glucoside | - | Plant | - | ||||
2-Bromo-4-cyanophenyl octanoate | - | Surface water; Sediment | - | ||||
3,4-Dihydroxybenzonitrile | - | Surface water; Sediment | - | ||||
3,5-di-bromo-4-hydroxybenzamide | - | Plant; Surface water; Sediment | - | ||||
3,5-di-bromo-4-hydroxybenzoic acid | - | Mammal; Plant | - | ||||
3,5-Dibromo-4-hydroxyphenyl D-glucopyranoside | - | - | - | ||||
3-Bromo-4,5-dihydroxybenzonitrile | - | Surface water; Sediment | - | ||||
3-Bromo-4-hydroxybenzonitrile | - | Surface water; Sediment | - | ||||
4-Hydroxybenzonitrile | - | Surface water; Sediment | - |
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Terrestrial ecotoxicology |
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116 | 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 ) Rat5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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420 | 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 ) Colinus virginianus5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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2.3 | A4 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 ) Eisenia foetida EC10 corr4 = Verified data |
Moderate | ||||||||
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Nitrogen mineralisation: Low, transient effect | 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 Dose: 2.57 mg kg⁻¹ 28 Day |
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125 | 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 ) Folsomia candida5 = Verified data used for regulatory purposes |
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199 | A4 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 ) Apis mellifera unknown test duration4 = Verified data |
Low | |||||||
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76.4 | A4 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 ) Apis mellifera unknown test duration4 = Verified data |
Moderate | ||||||||
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14.5 | 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 ) Apis mellifera as bromoxynil5 = Verified data used for regulatory purposes |
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30 | A4 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 ) Aphidius rhopalosiphi as octanate4 = Verified data |
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9.47 | A4 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 ) Typhlodromus pyri as octanate4 = Verified data |
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> 655 | 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 ) Poecilus cupreus5 = Verified data used for regulatory purposes |
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Aquatic ecotoxicology |
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0.032 | 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 ) Oncorhynchus mykiss5 = Verified data used for regulatory purposes |
High | ||||||||
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0.008 | 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 ) Pimephales promelas5 = Verified data used for regulatory purposes |
High | ||||||||
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0.208 | 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 ) Daphnia magna5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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0.15 | 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 ) Lemna gibba5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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0.75 | 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 ) Navicula pelliculosa 96 hr5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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General |
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High (class III) | - | - | ||||||||
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116 | 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 ) Rat5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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2000 | 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 ) Rat5 = Verified data used for regulatory purposes |
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1.217 | 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 ) Rat5 = Verified data used for regulatory purposes |
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0.003 | 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 ) as bromoxynil5 = Verified data used for regulatory purposes |
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0.013 | 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 ) as bromoxynil5 = Verified data used for regulatory purposes |
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0.003 | 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 ) as bromoxynil5 = Verified data used for regulatory purposes |
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Minimal risk from dietary exposure Risk assessment indicates ARfD would not normally be execeeded |
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GB MRL expected to deviate from the EU MRL in mid-2023 | ||||||||||
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Almost completely eliminated as bromoxynil phenol within 7 days via the urine | 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 |
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Health issues |
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Possible liver toxicant |
Handling issues |
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IMDG Transport Hazard Class 9 Not explosive or oxidising Not expected to auto-ignite; Not highly flammable |
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Health: H301, H317, H319, H332, H360d Environment: H400, H410 |
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II (Moderately hazardous) | |||
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UN3082 | |||
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Packaging Group III (minor danger) | |||
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bromoxynil-butanoate | ||
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Record last updated: | 22/08/2024 |
Contact: | aeru@herts.ac.uk |
Please cite as: | Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal, 22(4), 1050-1064. DOI: 10.1080/10807039.2015.1133242 |