Bensulfuron (Ref: IN-R9419) |
![]() Last updated: 12/01/2021 |
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(Also known as: free acid bensulfuron-methyl) |
SUMMARY |
Bensulfuron is a herbicide normally used as the methyl variant. It is not expected to be persistent in soil and as it is considered moderately mobile there are some risks of leaching to groundwater. Based on bensulfurons physico-chemical properties there may also be a risk of bio-concentration. Its is moderately toxic to aquatic plants and to earthworms. |
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A pyrimidinylsulfonylurea herbicide used to control annual and perennial weeds and sedges. Usually used as the methyl variant. Pesticide transformation product. | |
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Pigweed; Chickweed; Wild mustard; Stinkgrass; Barnyardgrass; Rice flatsedge; Dwarf umbrella grass; Nut-grass; Creeping water primrose | |
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Cereals especially wheat; Rice | |
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Current | |
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1985 |
UK regulatory status |
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Not approved | ||
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Not applicable | ||
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No UK approval for use |
EC Regulation 1107/2009 (repealing 91/414) |
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Approved | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Italy/Spain | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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31/10/2022 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Chemical structure |
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C₁₅H₁₆N₄O₇S | |
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COC1=CC(=NC(=N1)NC(=O)NS(=O)(=O)CC2=CC=CC=C2C(=O)O)OC | |
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No data | |
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PPWBRCCBKOWDNB-UHFFFAOYSA-N | |
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InChI=1S/C15H16N4O7S/c1-25-11-7-12(26-2)17-14(16-11)18-15(22)19-27(23,24)8-9-5-3-4-6-10(9)13(20)21/h3-7H,8H2,1-2H3,(H,20,21)(H2,16,17,18,19,22) | |
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Yes |
General status |
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Herbicide, Metabolite | |
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Soil | |
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Sulfonylurea | |
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EU dossier - None declared | |
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Synthetic | |
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Selective, systemic action being absorbed through foliage and roots. Inhibits plant amino acid synthesis - acetohydroxyacid synthase AHAS | |
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99283-01-9 | |
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502 | |
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107828 | |
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396.38 | |
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2-({[(4,6-dimethoxypyrimidin-2-yl)carbamoyl]sulfamoyl}methyl)benzoic acid | |
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α-[(4,6-dimethoxypyrimidin-2-ylcarbamoyl)sulfamoyl]-o-toluic acid | |
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2-[[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoic acid | |
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B | |
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2 | |
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Not applicable | |
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Not applicable | |
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Formulations |
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Usually formulated as the methyl variant |
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1.20 X 1002 | Calculated | - | |||||||
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2.08 | Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown source |
Low | ||||||||
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1.52 | Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown source |
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Degradation |
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11 | 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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26.2 | 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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86.6 | 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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EU dossier lab studies DT₅₀ range 8-54 days, DT₉₀ range 27-15 days | ||||||||||
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5.2 | 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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8.0 | 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 fast |
Soil adsorption and mobility |
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8.8 | 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 mobile | |||||||
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226 | ||||||||||
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0.9 | ||||||||||
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EU dossier Kf range 0.3-17.4 mL g⁻¹, Kfoc range 28-580 mL g⁻¹, 1/n range 0.89-0.93, Soils=5 | ||||||||||
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Fate indices |
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2.33 | Calculated | Transition state | ||||||||||||||||||||||||||
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1.08 X 10-01 | Calculated | - | |||||||||||||||||||||||||
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Key metabolites |
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Soil | 0.182 | Major fraction, Relevant | |||||
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Soil | 0.460 | Major fraction, Relevant |
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Low risk | Q3 Q = Miscellaneous internet resources Based on LogP < 33 = Unverified data of known source |
Low risk | |||||||
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6.2 | 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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26.4 | 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 ) Pseudokirchneriella subcapitata5 = Verified data used for regulatory purposes |
Low | ||||||||
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> 1000 | 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 ) Eisenia foetida5 = Verified data used for regulatory purposes |
Low | ||||||||
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General |
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High (class III) | - | - | ||||||||
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0.2 | 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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None allocated | 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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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 |
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Health issues |
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Possible liver toxicant |
Handling issues |
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Not explosive or oxidising | |||
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Reproduction risk category 3: R63 Xn - Harmful: R43 N - Dangerous for the environment: R50, R53 |
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S35, S57, S60, S61 | |||
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U (Unlikely to present an acute hazard) | |||
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bensulfuron | ||
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bensulfuron | ||
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Bensulfuron | ||
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bensulfuron | ||
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bensulfuron | ||
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bensulfuron | ||
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bensulfuron | ||
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benszulforon | ||
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Record last updated: | 12/01/2021 |
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 |