Pyridafol (Ref: CL 9673) |
Last updated: 18/07/2024 |
(Also known as: pyridate metabolite) |
SUMMARY |
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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Warning: Significant data are missing |
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A herbicide and chemical transformation product | |
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Broad-leaved weeds including nightshade, cleavers, nettles, chickweed;dead-nettle, fathen, ragweed; Grasses including barnyard grass, crabgrass, foxtail | |
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Cereals; Brassicas including cauliflowers, kohlrabi, broccoli, Brussels; Alliums including onions, shallots, chives, leek; Fodder beet; Lupins; Rape | |
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- | |
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- | |
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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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Not approved | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Not applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Not applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Additional information |
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Chemical structure |
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None | |
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C₁₀H₇ClN₂O | |
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C1=CC=C(C=C1)C2=NNC(=CC2=O)Cl | |
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- | |
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ZUSHSDOEVHPTCU-UHFFFAOYSA-N | |
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InChI=1S/C10H7ClN2O/c11-9-6-8(14)10(13-12-9)7-4-2-1-3-5-7/h1-6H,(H,12,14) | |
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Yes |
General status |
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Herbicide, Metabolite | |
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Soil, Surface water, Groundwater | |
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Pyradazine herbicide | |
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- | |
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- | |
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Synthetic | |
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Photosynthetic electron transport inhibitor at the photosystem II. | |
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40020-01-7 | |
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254-752-1 | |
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630 | |
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Not applicable | |
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92316 | |
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No data found | |
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206.62 | |
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6-chloro-3-phenylpyridazin-4-ol | |
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6-chloro-3-phenylpyridazin-4-ol | |
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6-chloro-3-phenyl-4-pyridazinol | |
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- | |
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- | |
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C3 | |
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6 | |
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Not applicable | |
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Not applicable | |
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- | |
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White powder | |
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Can be a metabolite of: |
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pyridafol-O-methyl | Soil | - | Major fraction | |||||
pyridate | Soil | 0.907 | Major fraction |
Formulations |
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23800 | 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 ) at pH 8.25 = Verified data used for regulatory purposes |
High | ||||||||
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408 | Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source |
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200.6 | Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source |
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3.63 X 1000 | Calculated | - | |||||||
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0.56 | 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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- | - | - | |||||||
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1.36 | Q2 Q = Miscellaneous data from online sources 2 = Unverified data of unknown source |
- | ||||||||
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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 ) 5 = Verified data used for regulatory purposes |
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1.94 X 10-04 | 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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7.86 X 10-07 | 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 ) at pH 5 20°C5 = Verified data used for regulatory purposes |
Non-volatile | ||||||||
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pH 6.4: 201.5nm=27877.5, 223.5nm=16670.5, 257.5nm=10366.5, 301.5nm=10366.5 pH 1.94: 196nm=46229.1, 225nm=12467.8, 277.5nm=105.06.6 pH 11.6: 206nm=53723.8, 222.5nm=31614.4, 256.5nm=15703.9, 14739.6nm=14739.6 |
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 |
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70.9 | 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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Degradation |
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2.2 | 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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2.2 | 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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97 | 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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23.1 | 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 |
Non-persistent | ||||||||
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321 | - | - | ||||||||
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EU dossier lab studies DT₅₀ range 16.5-42.8 days, DT₉₀ range 54.9-155 days; Field studies DT₅₀ range 0.6-82.0 days, DT₉₀ range 17.8-321 days | ||||||||||
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286 | 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 | ||||||||
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131 | 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 |
Stable | ||||||||
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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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- | 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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104 | ||||||||||
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EU dossier Koc range 20-188 mL g⁻¹ | ||||||||||
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1.707 | 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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41.5 | ||||||||||
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0.77 | ||||||||||
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EU dossier Kf range 0.11-10.2 mL g⁻¹, Kfoc range 4-339 mL g⁻¹, 1/n range 0.66-0.89, soils=22 | ||||||||||
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Adsoprtion increases with increasing OM and decreasing pH |
Fate indices |
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4.73 | Calculated | High leachability | ||||||||||||||||||||||||||
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3.19 X 1000 | Calculated | - | |||||||||||||||||||||||||
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Medium | Calculated | - | ||||||||||||||||||||||||||
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Moderately mobile | Calculated | - | ||||||||||||||||||||||||||
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55.2 | 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 method4 = Verified data |
Substance of concern for long-range air transport | ||||||||||||||||||||||||||
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2 | K2 K = Research datasets (e.g. Pandora, Demetra; these datasets no longer available). Norman Ecotoxicology database. (click here ) 2 = Unverified data of unknown source |
Low potential | |||||||||||||||||||||||||
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Not available | - |
Known metabolites |
None
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Terrestrial ecotoxicology |
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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 |
Low | ||||||||
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> 348 | 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 |
Moderate | ||||||||
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3.25 | 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 ) Eisenia foetida5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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Aquatic ecotoxicology |
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> 20.0 | 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 |
Moderate | ||||||||
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20 | 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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26.1 | 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 ) Daphnia magna5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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5.0 | 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 ) Daphnia magna5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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4.84 | 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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4.93 | 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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> 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 |
Low | ||||||||
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Health issues |
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No further information available |
Handling issues |
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No information available | |||
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Not classified | |||
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Not listed (Not listed) | |||
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pyridafol | ||
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6-chloro-3-phénylpyridazine-4-ol | ||
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6-Chlor-3-phenylpyridazin-4-ol | ||
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6-cloro-3-fenilpiridazin-4-ol | ||
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6-chloro-3-fenylopirydazyn-4-ol | ||
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Record last updated: | 18/07/2024 |
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 |