Diclofop (Ref: AE F021079) |
![]() Last updated: 12/01/2021 |
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(Also known as: diclofop acid; diclofop free acid; HOE 021079) |
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Post-emergence herbicide usually used as the methyl variant. Also a pesticide transformation product | |
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Wild oats; Crowsfoot grass; Annual ryegrass; Common barbgrass | |
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Vegetables including brassicas, beans, carrots, peas, parsnips, onions; Sugarbeet; Cereals including barley, wheat; Oilseed rape; Potatoes | |
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Current | |
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circa 1982 |
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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Portugal/France | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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31/05/2021 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes - low ADI / ARfD / AOEL | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Chemical structure |
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A chiral molecule. The technical material is an isomeric mixture. | |
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C₁₅H₁₂Cl₂O₄ | |
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CC(C(=O)O)OC1=CC=C(C=C1)OC2=C(C=C(C=C2)Cl)Cl | |
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No data | |
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OOLBCHYXZDXLDS-UHFFFAOYSA-N | |
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InChI=1S/C15H12Cl2O4/c1-9(15(18)19)20-11-3-5-12(6-4-11)21-14-7-2-10(16)8-13(14)17/h2-9H,1H3,(H,18,19) | |
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Yes |
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Common Name | Relationship | Link |
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diclofop-methyl | Derivative | ![]() |
General status |
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Herbicide, Metabolite | |
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Soil | |
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Aryloxyphenoxypropionate | |
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930 g kg⁻¹ | |
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EU dossier - None declared | |
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Synthetic | |
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Selective, absorbed by leaves and inhibits fatty acid synthesis. Inhibition of acetyl CoA carboxylase (ACCase) | |
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40843-25-2 | |
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- | |
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358 | |
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110902 | |
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38687 | |
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327.16 | |
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rac-(2R)-2-[4-(2,4-dichlorophenoxy)phenoxy]propanoic acid | |
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(RS)-2-[4-(2,4-dichlorophenoxy)phenoxy]propionic acid | |
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2-[4-(2,4-dichlorophenoxy)phenoxy]propanoic acid | |
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A | |
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1 | |
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Not applicable | |
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Not applicable | |
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- | |
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Pale yellow solid | |
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Can be a metabolite of: |
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diclofop-methyl | Soil | 0.87 | - |
Formulations |
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Usually supplied as an emulsion that is mixed with water and used as a spray |
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122700 | 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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4.07 X 1001 | Calculated | - | |||||||
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1.61 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Low | ||||||||
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1.4 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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3.43 | 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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0.0000031 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Low volatility | ||||||||
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Degradation |
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24 | 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 ) 4 = Verified data |
Non-persistent | |||||||
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23.9 | 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 |
Non-persistent | ||||||||
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35.2 | 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 |
Moderately persistent | ||||||||
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84.7 | 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 |
Moderately persistent | ||||||||
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EU dossier lab studies DT₅₀ range 5.1-74.0 days, DT₉₀ range 23.3-246 days, Field studies DT₅₀ range 25.7-52.2 days ; General literature DT₅₀ range 10 days (sand) - 30 days (sandy clay) | ||||||||||
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58.3 | 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 |
Moderately fast | ||||||||
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Soil adsorption and mobility |
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6.3 | 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 |
Moderately mobile | |||||||
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289 | ||||||||||
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0.882 | ||||||||||
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EU dossier kf range 0.76-13.54 mL g⁻¹, kfoc range 148-505.5 mL g⁻¹, 1/n range 0.819-0.913, Soils=6 | ||||||||||
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Yes |
Fate indices |
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2.38 | Calculated | Transition state | ||||||||||||||||||||||||||
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1.24 X 10-01 | Calculated | - | |||||||||||||||||||||||||
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Low | Calculated | - | ||||||||||||||||||||||||||
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Moderately mobile | Calculated | - |
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Low risk | 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 ) Based on LogP < 35 = Verified data used for regulatory purposes |
Low risk | |||||||
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> 586 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
Moderate | ||||||||
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> 10000 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Phasianidae3 = Unverified data of known 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 ) Oncorhynchus mykiss5 = Verified data used for regulatory purposes |
Low | ||||||||
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16.0 | 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 ) Oncorhynchus mykiss5 = Verified data used for regulatory purposes |
Low | ||||||||
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48 | 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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0.0156 | 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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10 | 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 |
Moderate | ||||||||
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10.4 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Pseudokirchneriella subcapitata4 = Verified data |
Low | ||||||||
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> 100 | 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 methyl variant4 = Verified data |
Low | |||||||
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> 131 | 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 methyl variant4 = Verified data |
Low | ||||||||
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> 500 | 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 corr5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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General |
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High (class III) | - | - | ||||||||
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> 586 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
Moderate | ||||||||
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0.001 | 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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0.03 | 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 |
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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 ) 5 = Verified data used for regulatory purposes |
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Readily absorbed through the gastrointestinal tract | ||||||||||
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Health issues |
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Kidney and liver toxicant |
Handling issues |
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Not explosive or oxidising | |||
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Health: H302, H317 Environment: H400, H410 |
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Xn - Harmful: R22, R43 N - Dangerous for the environment: R50, R53 |
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S2, S24, S37, S60, S61 | |||
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III (Slightly hazardous) | |||
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diclofop | ||
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dichlofop | ||
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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 |