Dichlorprop-P-etexyl (Ref: CA2134) |
Last updated: 29/08/2024 |
(Also known as: 2,4-DP EHE; dichlorprop-P 2-EHE; dichlorprop-P 2-ethylyhexyl ester) |
SUMMARY |
Dichlorprop-P 2-ethylyhexyl ester is a herbicide and plant growth regulator. It has a low aqueous solubility and a low volatility. It is not expected to be persistent in soil systems but may be persistent in aquatic systems depending on local conditions. It has a moderate toxicity to bds and aquatic species but is less toxic to honeybees. Dichlorprop-P 2-ethylyhexyl ester is moderately toxic to mammals via the oral route. It is also a reproduction/developmental toxin and a skin sensitiser. |
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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An ester of dichlorprop-P, mainly used as a plant growth regulator for citrus | |
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Fruit size; Anti-drop | |
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Oranges; Lemons; Grapefruit; Mandarins | |
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Extensive historic use has demonstrated its effectiveness | |
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Current | |
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1987, introduced |
UK regulatory status |
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Approved (as dichloprop-P) | ||
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30/04/2029 | ||
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None |
EC Regulation 1107/2009 (repealing 91/414) |
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Approved (as dichloprop-P) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Ireland/Poland | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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15/03/2025 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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No | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes (as dichlorprop-P) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Additional information |
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Chemical structure |
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The R-enantiomer of dichlorprop-etexyl | |
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C₁₇H₂₄Cl₂O₃ | |
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CCCCC(CC)COC(=O)C(C)OC1=C(C=C(C=C1)Cl)Cl | |
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CCCCC(CC)COC(=O)[C@@H](C)OC1=C(C=C(C=C1)Cl)Cl | |
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CEEDFYRUPAWDOU-PZORYLMUSA-N | |
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InChI=1S/C17H24Cl2O3/c1-4-6-7-13(5-2)11-21-17(20)12(3)22-16-9-8-14(18)10-15(16)19/h8-10,12-13H,4-7,11H2,1-3H3/t12-,13?/m1/s1 | |
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Yes |
General status |
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Herbicide, Plant Growth Regulator | |
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Aryloxyalkanoic acid herbicide; Phenoxypropionic herbicde; Auxin PGR | |
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920 g kg⁻¹ | |
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EU dossier: 2,4-dichlorophenol <3.0 g kg⁻¹; Dioxins & furans <0.01 mg kg⁻¹ | |
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Synthetic | |
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Selective, systemic, absorbed by leaves and translocates to roots. | |
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865363-39-9 | |
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682-532-9 | |
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476 | |
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- | |
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24843409 | |
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No data found | |
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347.3 | |
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- | |
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(2RS)-2-ethylhexyl (2R)-2-(2,4-dichlorophenoxy)propionate | |
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2-ethylhexyl (2R)-2-(2,4-dichlorophenoxy)propanoate | |
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- | |
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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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- | |
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Colourless to pale yellow liquid | |
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Formulations |
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Usually supplied as an emulsifiable concentrate applied as a high volume spray |
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0.17 | 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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250000 | 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-Heptane5 = Verified data used for regulatory purposes |
- | ||||||||
250000 | 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 ) p-Xylene5 = Verified data used for regulatory purposes |
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250000 | 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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250000 | 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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- | - | - | ||||||||
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300 | 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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6.46 X 1003 | Calculated | - | |||||||
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3.81 | 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 |
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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0.54 | 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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1.1 | 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 |
Moderately volatile | ||||||||
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Neutral pH: 230nm=9130, 285nm=1950, 293nm=1680 Acid pH: 230nm=8920, 285nm=1940, 293nm=1670 Basic pH: 230nm=8950, 285nm=1930, 292nm=1660 |
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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Degradation |
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Readily biodegradable | ||||||||||
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1.1 | 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 ) 4 = Verified data |
Non-persistent | |||||||
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1.1 | A3 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 ) 3 = Unverified data of known source |
Non-persistent | ||||||||
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6.6 | A3 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 ) 3 = Unverified data of known source |
Non-persistent | ||||||||
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1.69 | 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 ) Worse case5 = Verified data used for regulatory purposes |
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EU 2017 dossier lab studies DT₅₀ range 0.76-1.69 days, DT₉₀ range 2.5-5.6 days, Soils=4 | ||||||||||
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Unstable | 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 |
Unstable | |||||||
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Expected to rapidly convert to dichlorprop-P | ||||||||||
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120 | 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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Unstable at pH 9 | ||||||||||
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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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- | A3 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 ) 3 = Unverified data of known source |
Mobile | |||||||
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35.96 | ||||||||||
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0.799 | ||||||||||
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Fate indices |
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0.10 | Calculated | Low leachability | ||||||||||||||||||||||||||
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9.66 X 10-04 | Calculated | - | |||||||||||||||||||||||||
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Low | Calculated | - | ||||||||||||||||||||||||||
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Mobile | Calculated | - | ||||||||||||||||||||||||||
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23.23 | 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 ) Calculated using the Atkinson method. Assumed 0.5E+06 OH/cm³, 24 hr4 = Verified data |
Below the level of concern for long-range air transport | ||||||||||||||||||||||||||
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Known soil metabolites |
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Major fraction | 0.916 | - |
Known groundwater metabolites |
None
Other known metabolites |
None
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Terrestrial ecotoxicology |
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> 824 | 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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1010 | 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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> 180 | 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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> 178.1 | 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 ) Apis mellifera5 = Verified data used for regulatory purposes |
Low | ||||||||
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Aquatic ecotoxicology |
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10.2 | 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 ) Oncorhynchus mykiss5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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> 1.5 | 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 |
Moderate | ||||||||
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6.7 | 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 ) Selenastrum capricornutum5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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General |
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High (class III) | - | - | ||||||||
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> 824 | 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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4.1 | 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 ) Rat 4 hr5 = Verified data used for regulatory purposes |
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0.06 | 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 ) Mouse SF=1005 = Verified data used for regulatory purposes |
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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 ) Rat SF=1005 = Verified data used for regulatory purposes |
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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 ) Rat SF=1005 = Verified data used for regulatory purposes |
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0.08 | 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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19-45 | 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 ) concentration dependent4 = Verified data |
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Negligible risk to bystanders | |||||||||
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PPE/PPC recommended to reduce exposure risk | ||||||||||
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Extensive absorption, rapid excretion mainly via 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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Highly toxic Possible kidney, liver & blood toxicant May cause allergic skin reaction |
Handling issues |
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Not explosive or oxidising IMDG Transport Hazard Class 9 Not expected to auto-ignite; Not highly flammable |
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Health: H302, H315, H317 | |||
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Not listed (Not listed) | |||
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UN3077 | |||
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Packaging Group II (moderate danger) | |||
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dichlorprop-P-etexyl | ||
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Record last updated: | 29/08/2024 |
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 |