Clopyralid potassium |
![]() Last updated: 12/01/2021 |
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(Not known by any other names) |
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A herbicide for a post-emergent control of many broad-leaved weeds in ornamental lawns, turf, non-cropped areas and some food crops | |
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Broad-leaved weeds including thistles, dandelion, horseweed, nightshade, clover | |
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Turf and lawns; Rights of way; Cereals including wheat, barley, oats; Sugarbeet | |
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Current | |
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UK regulatory status |
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Approved (as clopyralid) | ||
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30/04/2024 | ||
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None |
EC Regulation 1107/2009 (repealing 91/414) |
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Approved (as clopyralid) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finland/Poland | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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30/04/2021 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Chemical structure |
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C₆H₂Cl₂KNO₂ | |
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Not applicable | |
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RLQCYSVYYHHLIL-UHFFFAOYSA-M | |
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InChI=1S/C6H3Cl2NO2.K/c7-3-1-2-4(8)9-5(3)6(10)11;/h1-2H,(H,10,11);/q;+1/p-1 | |
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General status |
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Herbicide | |
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Pyridine compound | |
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Synthetic | |
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Selective, systemic, absorbed through leaves and roots. Synthetic auxin. | |
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58509-83-4 | |
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230.09 | |
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potassium 3,6-dichloropyridine-2-carboxylate | |
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potassium 3,6-dichloropyridine-2-carboxylate | |
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potassium 3,6-dichloro-2-pyridinecarboxylate | |
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Possible groundwater contaminant; PAN Listed as Highly Hazardous Chemical | |
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Not applicable | |
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Not applicable | |
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Formulations |
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Usually supplied as a soluble concentrate that is mixed with water and applied as a spray. |
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Degradation |
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34 | 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 ) as clopyralid4 = Verified data |
Moderately persistent | |||||||
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34 | 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 ) as clopyralid4 = Verified data |
Moderately persistent | ||||||||
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11 | 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 ) as clopyralid4 = Verified data |
Non-persistent | ||||||||
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113 | 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 ) as clopyralid4 = Verified data |
Persistent | ||||||||
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38 | 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 ) as clopyralid4 = Verified data |
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EU dossier for clopyralid lab studies DT₅₀ range 13-65 days, DT₉₀ range 43-217 days, field studies DT₅₀ range 2-24 days, DT₉₀ range 6-79 days; Other sources: DT₅₀ 40 days (R3) | ||||||||||
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Soil adsorption and mobility |
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0.071 | - | Very mobile | |||||||
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5.0 | ||||||||||
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EU dossier for clopyralid Kd range 0.032-0.151, Koc range 3.43-7.34 mL g⁻¹, Soils=5 | ||||||||||
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Fate indices |
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3.44 | Calculated | High leachability | ||||||||||||||||||||||||||
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1.36 X 10-01 | Calculated | - | |||||||||||||||||||||||||
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> 99.9 | 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 ) Oncorhynchus mykiss as clopyralid4 = Verified data |
Moderate | ||||||||
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> 99.0 | 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 ) Daphnia magna as clopyralid4 = Verified data |
Moderate | ||||||||
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89.0 | 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 ) Lemna gibba as clopyralid4 = Verified data |
Low | ||||||||
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6.9 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Selenastrum capricornutum4 = Verified data |
Moderate | ||||||||
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> 98.1 | 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 ) as clopyralid4 = Verified data |
Moderate | |||||||
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> 1000 | 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 as clopyralid 4 = Verified data |
Low | ||||||||
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General |
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High (class III) | - | - | ||||||||
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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 ) Rat SF=100 as clopyralid5 = 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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1.0 | 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 ) as clopyralid5 = Verified data used for regulatory purposes |
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Minimal risk of dietary exposure | |||||||||
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Risk of exposure acceptable under label recommendations for use for personal protection clothing and equipment | ||||||||||
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Health issues |
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Corrosive to ocular tissue |
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Prevent release of dust Not explosive or oxidising |
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Health: H318 | |||
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Xi - Irritant: R41 | |||
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S2, S26, S39 | |||
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III (Slightly hazardous) | |||
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3077 | |||
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Packaging Group III (minor danger) |
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clopyralid potassium | ||
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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 |