Triclopyr |
![]() Last updated: 12/01/2021 |
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(Not known by any other names) |
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A herbicide for perennial broad-leaved and woody weed control mainly on uncultivated areas | |
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Alder; Blackberry; Boxelder; Buckthorn; Cottonwood; Gorse; Hawthorn; Mulberry; Sassafras; Wild rose; Burdock; Curly dock; Canada thistle; Mustard; Lambsquarter | |
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Uncultivated areas; Grassland; Plantations; Rangeland; Right-of-way; Industrial sites; Ornamental turf; Rice | |
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Current | |
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1979 |
UK regulatory status |
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Approved | ||
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30/04/2024 | ||
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Buffer probably required in UK - see product label |
EC Regulation 1107/2009 (repealing 91/414) |
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Approved | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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30/04/2021 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Australia, USA |
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Chemical structure |
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C₇H₄Cl₃NO₃ | |
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C1=C(C(=NC(=C1Cl)Cl)OCC(=O)O)Cl | |
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No data | |
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REEQLXCGVXDJSQ-UHFFFAOYSA-N | |
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InChI=1S/C7H4Cl3NO3/c8-3-1-4(9)7(11-6(3)10)14-2-5(12)13/h1H,2H2,(H,12,13) | |
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Yes |
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Common Name | Relationship | Link |
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triclopyr | - | ![]() |
General status |
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Herbicide | |
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Pyridine compound | |
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960g kg⁻¹ as butoxyethyl ester | |
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EU dossier - None declared | |
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Synthetic | |
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Selective, systemic, absorbed through roots and foliage. Synthetic auxin. | |
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55335-06-3 | |
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259-597-3 | |
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376 | |
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116001 | |
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41428 | |
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256.47 | |
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((3,5,6-trichloropyridin-2-yl)oxy)acetic acid | |
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3,5,6-trichloro-2-pyridyloxyacetic acid | |
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((3,5,6-trichloro-2-pyridinyl)oxy)acetic acid | |
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Potential groundwater pollutant | |
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O | |
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4 | |
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Not applicable | |
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Not applicable | |
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White solid | |
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Formulations |
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Usually formulated as an emulsifiable concentrate |
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8100 | 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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90 | 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 ) Hexane5 = Verified data used for regulatory purposes |
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19000 | 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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665000 | 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 ) Methanol5 = Verified data used for regulatory purposes |
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582000 | 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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150 | 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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Decomposes before boiling | 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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210 | 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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Not expected to self ignite; Not highly flammable | 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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3.55 X 10-01 | Calculated | - | |||||||
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-0.45 | 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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1.3 | 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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3.97 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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Weak acid | |||||||||||
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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 |
Low volatility | ||||||||
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2.90 X 10-03 | 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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Degradation |
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18.81 | 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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18.81 | 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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30 | 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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105 | 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 |
Persistent | ||||||||
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153.9 | 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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EU 2018 dossier lab studies DT₅₀ (normalised) range 8.11-53.1 days, DT₉₀ (actual) range 26.9-178 days, Soils=8 | ||||||||||
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10.9 | R4 R = Peer reviewed scientific publications 4 = Verified data |
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Published literature RL₅₀ range 4.0-17.8 days, 2 field grown crops, leaves, n=2 | ||||||||||
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0.1 | 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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8.7 | 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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pH and temperature sensitive: DT₅₀ 84 days at pH 5 and 25 °C, 26 days at pH 5 and 35 °C, 8.7 days at pH 7 and 25 °C, 2.3 days at pH 7 and 35 °C, 0.3 days at pH 9 and 25 °C, 0.06 days at pH 9 and 35 °C | ||||||||||
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29.2 | 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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24.8 | 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 |
Slow |
Soil adsorption and mobility |
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- | DW4 DW = Don Wauchope personal database for Pka data: Wauchope, R. D. and Edwards, J. Dissociation constants for pesticide active ingredients: a database and comparison with predicted values. MS in preparation 4 = Verified data |
Mobile | |||||||
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27 | ||||||||||
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1.017 | 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 |
Mobile | |||||||
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57.95 | ||||||||||
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0.917 | ||||||||||
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EU 2018 dossier kf range 0.574-2.647 mL g⁻¹, Kfoc range 35.84-80.22 mL g⁻¹, 1/n range 0.883-0.942, Soils=5; Literature mean: Kf = 5.2 mL g⁻¹, Kfoc = 56.7 mL g⁻¹, 1/n = 0.898, Soils = 7 | ||||||||||
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Fate indices |
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3.30 | Calculated | High leachability | ||||||||||||||||||||||||||
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3.86 X 10-01 | Calculated | - | |||||||||||||||||||||||||
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Low | Calculated | - | ||||||||||||||||||||||||||
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Mobile | Calculated | - |
Key metabolites |
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Soil | 0.331 | Major fraction; Relevant |
Other known metabolites |
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3,6-dichloro-2-pyridinol | - | Water/sediment | - | - | |||||
6-chloro-2-pyridinol | - | Water/sediment | - | - | |||||
3,5,6-trichloro-2-methoxypyridine | - | Plant | - | - |
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0.77 | 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 ) (Other literature Log BCF range -0.3-0.04 (R3))5 = Verified data used for regulatory purposes |
Low potential | |||||||
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14 | - | |||||||||
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630 | 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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3 | L2 L = Pesticide manuals and hard copy reference books / other sources Rat 2 year2 = Unverified data of unknown source |
High | |||||||
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25 | 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 Reproductive NOAEL5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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1698 | 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 ) Anas platyrhynchos5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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> 5620 mg kg feed⁻¹ | 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 ) Anas platyrhynchos5 = Verified data used for regulatory purposes |
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16.95 | 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 virginianus NOEC5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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117 | 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 |
Low | ||||||||
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46.3 | 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 |
Low | ||||||||
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132.9 | 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 |
Low | ||||||||
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48.5 | 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 ) Daphnia magna5 = Verified data used for regulatory purposes |
Low | ||||||||
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23.0 | 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 ) Chironomus riparius5 = Verified data used for regulatory purposes |
Low | ||||||||
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0.8 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Lemna gibba4 = Verified data |
Moderate | ||||||||
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181.1 | 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 ) Selenastrum capricornutum5 = Verified data used for regulatory purposes |
Low | ||||||||
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8 | Q2 Q = Miscellaneous internet resources Unknown species2 = Unverified data of unknown source |
Low | ||||||||
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> 100 | 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 mellifera5 = Verified data used for regulatory purposes |
Low | |||||||
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> 100 | 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 mellifera5 = Verified data used for regulatory purposes |
Low | ||||||||
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> 521 | 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 corr4 = Verified data |
Moderate | ||||||||
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6.0 | 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 ) Eisenia foetida 56 day5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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General |
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High (class III) | - | - | ||||||||
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630 | 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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> 4.8 | 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 ) Rat 4hr (nose only)5 = Verified data used for regulatory purposes |
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0.03 | 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=1005 = Verified data used for regulatory purposes |
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0.3 | 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 ) Rabbit SF=1005 = Verified data used for regulatory purposes |
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0.05 | 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=1005 = Verified data used for regulatory purposes |
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10-18 | 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 ) concentration dependent5 = Verified data used for regulatory purposes |
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No unacceptable risks to bystanders identified | |||||||||
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Risk to operators but acceptable under label recommendations for use for personal protection clothing and equipment | ||||||||||
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Health issues |
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Highly toxic Heart, kidney and liver toxicant |
Handling issues |
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Not explosive or oxidising IMDG Transport Code is usually 9 |
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Health: H302, H319, H317, H373 Environment: H410 |
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Reproduction risk category 3: R63 Xn - Harmful: R22, R43 Xi - Irritant: R36 N - Dangerous for the environment: R52 |
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II (Moderately hazardous) | |||
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Usually 3082 | |||
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Packaging Group III (minor danger) |
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triclopyr | ||
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triclopyr | ||
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Triclopyr | ||
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triclopyr | ||
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triclopir | ||
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triclopir | ||
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trichlopyr | ||
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triklopyr | ||
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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 |