Omethoate (Ref: ENT 25776) |
![]() Last updated: 18/06/2020 |
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(Also known as: dimethoate-met; dimethoxon) |
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An insecticide and acaricide to control a wide range of pests on fruit, hops and other crops. Also a pesticide transformation product | |
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Aphids; Mites; Caterpillars; Beetles; Mealybugs; Scale | |
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Fruit including citrus, apples, plum; Hops; Sugarbeet; Potatoes; Cereals; Ornamentals | |
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Current | |
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circa 1960 |
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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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Australia |
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Chemical structure |
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None | |
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C₅H₁₂NO₄PS | |
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CNC(=O)CSP(=O)(OC)OC | |
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No data | |
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PZXOQEXFMJCDPG-UHFFFAOYSA-N | |
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InChI=1S/C5H12NO4PS/c1-6-5(7)4-12-11(8,9-2)10-3/h4H2,1-3H3,(H,6,7) | |
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Yes |
General status |
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Insecticide, Acaricide, Metabolite | |
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Soil; Groundwater; Surface water; Sediment; Air | |
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Organophosphate | |
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- | |
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- | |
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Synthetic | |
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Systemic with contact and stomach action. Cholinesterase inhibitor. | |
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1113-02-6 | |
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214-197-8 | |
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202 | |
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- | |
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14210 | |
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213.2 | |
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- | |
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2-dimethoxyphosphinoylthio-N-methylacetamide | |
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O,O-dimethyl S-(2-(methylamino)-2-oxoethyl) phosphorothioate | |
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Chemical subject to PIC regulations | |
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UK Statutory standard for the protection of aquatic life in surface waters: 0.01 µg l⁻¹ | |
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Not applicable | |
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Not applicable | |
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1B | |
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Not applicable | |
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Leptinotarsa decemlineata, Aonidella aurantii, Aphis gossypii, Macrosiphum avenae, Myzus persicae, many others | |
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Colourless liquid |
Can be a metabolite of: |
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dimethoate | Soil | 0.150 | Major fraction, Not relevant |
Formulations |
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Usually supplied as a soluble concentrate or emulsifiable concentrate |
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500000 | 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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Miscible | L3 L = Pesticide manuals and hard copy reference books / other sources Acetone3 = Unverified data of known source |
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Miscible | L3 L = Pesticide manuals and hard copy reference books / other sources Methanol3 = Unverified data of known source |
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-28 | L3 L = Pesticide manuals and hard copy reference books / other sources Solidifies3 = Unverified data of known source |
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135 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) 3 = Unverified data of known source |
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128 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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1.26 X 10-01 | Calculated | - | |||||||
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-0.9 | 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 |
Low | ||||||||
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1.32 | 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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19.0 | 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 ) 5 = Verified data used for regulatory purposes |
Highly volatile | ||||||||
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4.62 X 10-09 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) 3 = Unverified data of known source |
Non-volatile | ||||||||
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Neutral soln: 194.4nm=6366.1 Acid soln: 207.5nm=2401.2 Basic soln: 233.5nm=3020.7 |
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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Degradation |
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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 |
Non-persistent | |||||||
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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 |
Non-persistent | ||||||||
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14 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) 5 = Verified data used for regulatory purposes |
Non-persistent | ||||||||
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0.6 | 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 |
Non-persistent | ||||||||
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EU 2017 dossier Lab studies Dt50 range 0.1-0.3 days, DT₉₀ range 0.1-1.2 days, Soils=3 | ||||||||||
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1.7 | R4 R = Peer reviewed scientific publications 4 = Verified data |
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Published literature RL₅₀ range 1.3-2.1 days, wheat, various matrices, n=3 | ||||||||||
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Stable | B4 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) 4 = Verified data |
Stable | |||||||
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17 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) 5 = Verified data used for regulatory purposes |
Non-persistent | |||||||
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4.5 | K4 K = Research datasets, e.g. Pandora, Demetra 4 = Verified data |
Fast | ||||||||
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Soil adsorption and mobility |
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0.53 | 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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41.3 | ||||||||||
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EU dossier Kd range 0.20-0.99 mL g⁻¹, Koc range16-87 mL g⁻¹, Soils=3 | ||||||||||
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Fate indices |
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2.73 | Calculated | Transition state | ||||||||||||||||||||||||||
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1.17 X 10-01 | Calculated | - | |||||||||||||||||||||||||
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Low | Calculated | - | ||||||||||||||||||||||||||
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Mobile | Calculated | - |
Other known metabolites |
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dimethylthiophosphate | DMTP | Mammals | - | - | |||||
dimethylphosphate | DMP | Mammals | - | - |
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75 | Q2 Q = Miscellaneous internet resources Estimated2 = Unverified data of unknown source |
Low potential | |||||||
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Not available | - | |||||||||
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50.0 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Rat4 = Verified data |
High | ||||||||
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- | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Rat5 = Verified data used for regulatory purposes |
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0.5 | - | |||||||||
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9.9 | 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 ) Colinus virginianus5 = Verified data used for regulatory purposes |
High | ||||||||
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9.1 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Oncorhynchus mykiss5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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0.022 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Daphnia magna5 = Verified data used for regulatory purposes |
High | ||||||||
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0.000004 | P3 P = Other governments and regulators Unknown species3 = Unverified data of known source |
High | ||||||||
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167.5 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Scenedemus subspicatus5 = Verified data used for regulatory purposes |
Low | ||||||||
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0.048 | 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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46 | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) Eisenia andrei5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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General |
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High (class III) | - | - | ||||||||
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50.0 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Rat4 = Verified data |
High | ||||||||
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145.0 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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0.3 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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0.0003 | 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 ) EU 20065 = Verified data used for regulatory purposes |
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0.002 | 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 ) EU 20065 = Verified data used for regulatory purposes |
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0.0003 | 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 ) EU 20065 = Verified data used for regulatory purposes |
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List I; List II | - | - | ||||||||
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Occupational exposure may occur through inhalation and dermal contact | ||||||||||
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Health issues |
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Toxic if swallowed May cause cyanosis |
Handling issues |
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Flammable | |||
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Health: H301, H312 Environment: H400 |
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T - Toxic: R25 Xn - Harmful: R21 N - Dangerous for the environment: R50 |
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S1/2, S23, S36/37, S45, S61 | |||
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Ib (Highly hazardous / Highly hazardous) | |||
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3018 | |||
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omethoate | ||
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omethoate | ||
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Omethoat | ||
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omethoate | ||
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ometoato | ||
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ometoato | ||
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ometoat | ||
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Record last updated: | 18/06/2020 |
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 |