Fenoxaprop-ethyl |
![]() Last updated: 19/01/2021 |
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(Not known by any other names) |
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An obsolete herbicide once used to control perennial and annual grass weeds in a variety of crops | |
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Goosegrass; Grabgrass; Bermuda grass; Barnyard grass; Foxtails | |
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Turf; Ornamentals; Rice | |
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Obsolete | |
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circa 1990 |
UK regulatory status |
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Not approved | ||
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Expired | ||
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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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Expired | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Not applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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USA |
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Chemical structure |
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Fenoxaprop is a chiral molecule existing in the R- and S-forms. | |
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C₁₈H₁₆ClNO₅ | |
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CCOC(=O)C(C)OC1=CC=C(C=C1)OC2=NC3=C(O2)C=C(C=C3)Cl | |
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No data | |
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PQKBPHSEKWERTG-UHFFFAOYSA-N | |
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InChI=1S/C18H16ClNO5/c1-3-22-17(21)11(2)23-13-5-7-14(8-6-13)24-18-20-15-9-4-12(19)10-16(15)25-18/h4-11H,3H2,1-2H3 | |
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Yes |
General status |
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Herbicide | |
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Aryloxyphenoxypropionate | |
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- | |
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- | |
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Synthetic | |
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Selective, inhibits fatty acid biosynthesis (ACCase) | |
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66441-23-4 | |
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266-362-9 | |
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424 | |
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128701 | |
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47938 | |
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361.78 | |
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rac-ethyl (2R)-2-{4-[(6-chloro-1,3-benzoxazol-2-yl)oxy]phenoxy}propanoate | |
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ethyl (RS)-2-[4-(6-chloro-1,3-benzoxazol-2-yloxy)phenoxy]propionate | |
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ethyl 2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoate | |
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- | |
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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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White solid |
Formulations |
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Usually supplied as an emulsifiable concentrate or as an aqueous emulsion |
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0.9 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) 5 = Verified data used for regulatory purposes |
Low | ||||||||
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510000 | B4 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Acetone4 = Verified data |
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340000 | B4 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Toluene4 = Verified data |
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20000 | B4 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Ethanol4 = Verified data |
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5000 | B4 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Hexane4 = Verified data |
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86 | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
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1.91 X 1004 | Calculated | - | |||||||
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4.28 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) 5 = Verified data used for regulatory purposes |
High | ||||||||
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1.3 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) 5 = Verified data used for regulatory purposes |
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Not applicable | R4 R = Peer reviewed scientific publications 4 = Verified data |
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No dissociation | |||||||||||
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1.87 X 10-04 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) 5 = Verified data used for regulatory purposes |
Low volatility | ||||||||
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1.60 X 10-03 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
Non-volatile | ||||||||
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Degradation |
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5 | B4 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) 4 = Verified data |
Non-persistent | |||||||
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5 | B4 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) 4 = Verified data |
Non-persistent | ||||||||
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4 | Y4 Y = Germany's Federal Environment Agency (UBA) (click here ) 4 = Verified data |
Non-persistent | ||||||||
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Lab studies DT₅₀ range 1-14 days; General literature: DT₅₀ 9 days (aerobic conditions), 30 days (anaerobic conditions) | ||||||||||
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171 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) 5 = Verified data used for regulatory purposes |
Stable | |||||||
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100 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) 5 = Verified data used for regulatory purposes |
Persistent | |||||||
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1 | K4 K = Research datasets, e.g. Pandora, Demetra 4 = Verified data |
Fast | ||||||||
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Soil adsorption and mobility |
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- | H3 H = The US ARS pesticide properties database (click here ) 3 = Unverified data of known source |
Non-mobile | |||||||
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9490 | ||||||||||
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Fate indices |
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0.01 | Calculated | Low leachability | ||||||||||||||||||||||||||
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1.92 X 10-03 | Calculated | - | |||||||||||||||||||||||||
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Medium | Calculated | - | ||||||||||||||||||||||||||
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Non-mobile | Calculated | - |
Key metabolites |
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Soil | 0.60 | Major fraction |
Other known metabolites |
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2-(4-(6-chloro-benzoxazol-2-yloxy)-phenoxy)propanoic acid Note: DT50 soil = 12 days |
- | Soil | 0.100 | - |
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4.9 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Whole fish4 = Verified data |
Low potential | |||||||
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Not available | - | |||||||||
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2429 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Rat5 = Verified data used for regulatory purposes |
Low | ||||||||
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28 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Rat5 = Verified data used for regulatory purposes |
High | |||||||
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2510 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Anas platyrhynchos5 = Verified data used for regulatory purposes |
Low | ||||||||
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0.48 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Salmonidae5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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11.5 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Daphnia magna5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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0.56 | P4 P = Other governments and regulators Daphnia magna4 = Verified data |
Moderate | ||||||||
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0.068 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Americamysis bahia3 = Unverified data of known source |
High | ||||||||
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0.43 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Pseudokirchneriella subcapitata3 = Unverified data of known source |
Moderate | ||||||||
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0.18 | Q2 Q = Miscellaneous internet resources Unknown species2 = Unverified data of unknown source |
Moderate | ||||||||
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300 | B4 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) 4 = Verified data |
Low | |||||||
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413 | K3 K = Research datasets, e.g. Pandora, Demetra 3 = Unverified data of known source |
Moderate | ||||||||
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General |
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High (class III) | - | - | ||||||||
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2429 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Rat5 = Verified data used for regulatory purposes |
Low | ||||||||
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Health issues |
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USEPA - some evidence to suggest possible human carcinogen |
Handling issues |
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No information available | |||
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Health: H317 Environment: H400, H410 |
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Xn - Harmful: R43 N - Dangerous for the environment: R50, R53 |
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S2, S24, S37, S60, S61 | |||
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O (Obsolete substance) | |||
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fenoxaprop-ethyl | ||
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fenoxaprop | ||
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Fenoxaprop | ||
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fenoxaprop-ethyl | ||
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fenoxapropetile | ||
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fenoxaprop-etil | ||
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fenoksaprop etylu | ||
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fenoxaprop | ||
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Record last updated: | 19/01/2021 |
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 |