Parathion-ethyl (Ref: OMS 19) |
![]() Last updated: 27/11/2019 |
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(Also known as: parathion; thiophos; ethyl parathion; BAY 9491; ENT 15108; AC 3422) |
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A broad-spectrum insecticide and acaricide used to control sucking and chewing insects and mites | |
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Aphids; Mealybugs; Codling moth; Scale, Leafhoppers | |
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Alfalfa; Barley; Rapseed; Cotton; Sorghum; Soybeans; Sunflowers; Wheat; Broccoli; Brussel sprouts | |
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- | |
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Obsolete. Banned in many countries. | |
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circa 1950 |
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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Italy | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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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Chemical structure |
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None | |
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C₁₀H₁₄NO₅PS | |
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CCOP(=S)(OCC)OC1=CC=C(C=C1)[N+](=O)[O-] | |
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No data | |
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LCCNCVORNKJIRZ-UHFFFAOYSA-N | |
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InChI=1S/C10H14NO5PS/c1-3-14-17(18,15-4-2)16-10-7-5-9(6-8-10)11(12)13/h5-8H,3-4H2,1-2H3 | |
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Yes |
General status |
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Insecticide, Acaricide | |
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Organophosphate | |
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- | |
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Synthetic | |
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Non-systemic with contact, stomach and some respiratory action. Acetylcholinesterase (AChE) inhibitor. | |
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56-38-2 | |
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200-271-7 | |
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10 | |
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057501 | |
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991 | |
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291.27 | |
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O,O-diethyl-O-4-nitrophenyl phosphorothioate | |
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O,O-diethyl O-4-nitrophenyl phosphorothioate | |
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O,O-diethyl O-(4-nitrophenyl) phosphorothioate | |
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PIC Annex III; Potential groundwater contaminant; Marine Pollutant; Rotterdam Convention (Class Ia) | |
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- | |
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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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Adoxophyes orana, Aedes dorsalis, Aedes melanimon, Aedes nigromaculis, Amblyseius potentillae, Bemisia tabaci, many others | |
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White crystalline solid with foul odour when pure. technical substance may be a pale yellow liquid | |
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Formulations |
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Available in a variety of formulations including dusts, emulsion concentrates, granules, ULV liquids and wettable powders |
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12.4 | G4 G = Extension Toxicology network database EXTOXNET (click here ) 4 = Verified data |
Low | ||||||||
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200000 | L3 L = Pesticide manuals and hard copy reference books / other sources Dichloromethane3 = Unverified data of known source |
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200000 | L3 L = Pesticide manuals and hard copy reference books / other sources Toluene3 = Unverified data of known source |
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75000 | L2 L = Pesticide manuals and hard copy reference books / other sources Hexane2 = Unverified data of unknown source |
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200000 | L3 L = Pesticide manuals and hard copy reference books / other sources Isopropanol3 = Unverified data of known source |
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6.1 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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375 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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174 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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6.76 X 1003 | Calculated | - | |||||||
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3.83 | G4 G = Extension Toxicology network database EXTOXNET (click here ) 4 = Verified data |
High | ||||||||
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1.26 | AC4 AC = EC Joint Research Centre ESIS European Chemical Substance Information Systems including EINECS, now integrated with the database provided by the European Chemicals Agency (ECHA) (click here ) 4 = Verified data |
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0.89 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Low volatility | ||||||||
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3.02 X 10-02 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Non-volatile | ||||||||
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Degradation |
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49 | K4 K = Research datasets, e.g. Pandora, Demetra 4 = Verified data |
Moderately persistent | |||||||
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14 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) 3 = Unverified data of known source |
Non-persistent | ||||||||
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17 | AC4 AC = EC Joint Research Centre ESIS European Chemical Substance Information Systems including EINECS, now integrated with the database provided by the European Chemicals Agency (ECHA) (click here ) 4 = Verified data |
Non-persistent | ||||||||
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ICULID datasheet DT₅₀ lab studies 3-32 days, field studies DT₅₀ range 2-58 days; Other sources: 7DT₅₀ -10 days (R3) | ||||||||||
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3.8 | R4 R = Peer reviewed scientific publications 4 = Verified data |
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Published literature RL₅₀ range 0.2-19.6 days, wide range of field grown crops and wide range of matrics, n=30 | ||||||||||
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5.1 | - | - | |||||||
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Published literature RL₅₀ range 0.7-31.1 days, wide range of field grown crops and wide range of matrics, n=32 | ||||||||||
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30 | AC4 AC = EC Joint Research Centre ESIS European Chemical Substance Information Systems including EINECS, now integrated with the database provided by the European Chemicals Agency (ECHA) (click here ) 4 = Verified data |
Stable | |||||||
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260 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Persistent | |||||||
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pH sensitive: DT₅₀ 272 days at pH 4, 130 days at pH 9, all at 22 °C | ||||||||||
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4.3 | K4 K = Research datasets, e.g. Pandora, Demetra 4 = Verified data |
Fast | ||||||||
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3.5 | K4 K = Research datasets, e.g. Pandora, Demetra 4 = Verified data |
Moderately fast |
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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7660 | ||||||||||
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Other sources: 316.2-15849 mL g⁻¹ (R3) | ||||||||||
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17 | R4 R = Peer reviewed scientific publications 4 = Verified data |
Slightly mobile | |||||||
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580 | ||||||||||
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0.95 | ||||||||||
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Kf range 13.0-21.0 (229 for peat) mL g⁻¹, Kfoc range 491-636 (355 for peat) mL g⁻¹, 1/n - no data, Soils=4 | ||||||||||
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Fate indices |
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1.52 | Calculated | Low leachability | ||||||||||||||||||||||||||
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3.32 X 10-02 | Calculated | - | |||||||||||||||||||||||||
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Medium | Calculated | - | ||||||||||||||||||||||||||
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Non-mobile | Calculated | - |
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40 | P4 P = Other governments and regulators (Other literature values Log BCF range 1.1-1.9 (R3))4 = Verified data |
Low potential | |||||||
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<0.5 | - | |||||||||
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2 | G4 G = Extension Toxicology network database EXTOXNET (click here ) Rat4 = Verified data |
High | ||||||||
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- | L2 L = Pesticide manuals and hard copy reference books / other sources Rat 2 year2 = Unverified data of unknown source |
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2 | - | |||||||||
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2.1 | G4 G = Extension Toxicology network database EXTOXNET (click here ) Anas platyrhynchos4 = Verified data |
High | ||||||||
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1.5 | L3 L = Pesticide manuals and hard copy reference books / other sources Oncorhynchus mykiss3 = Unverified data of known source |
Moderate | ||||||||
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> 0.098 | P3 P = Other governments and regulators Danio rerio3 = Unverified data of known source |
Moderate | ||||||||
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0.0025 | L3 L = Pesticide manuals and hard copy reference books / other sources Daphnia magna3 = Unverified data of known source |
High | ||||||||
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0.0001 | P3 P = Other governments and regulators Daphnia magna3 = Unverified data of known source |
High | ||||||||
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0.00011 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Americamysis bahia4 = Verified data |
High | ||||||||
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0.14 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Chironomus riparius 1 day3 = Unverified data of known source |
Moderate | ||||||||
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10.0 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Scenedemus subspicatus4 = Verified data |
Moderate | ||||||||
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> 0.21 | R4 R = Peer reviewed scientific publications 4 = Verified data |
High | ||||||||
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> 0.175 | F2 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Apis mellifera 2 = Unverified data of unknown source |
High | ||||||||
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> 267 | L3 L = Pesticide manuals and hard copy reference books / other sources Eisenia foetida3 = Unverified data of known source |
Moderate | ||||||||
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Harmful | AB1 AB = SELECTV Database Typhlodromus pyri1 = Estimated data with little or no verification |
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General |
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High (class III) | - | - | ||||||||
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2 | G4 G = Extension Toxicology network database EXTOXNET (click here ) Rat4 = Verified data |
High | ||||||||
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71.0 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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0.03 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat (aerosol)3 = Unverified data of known source |
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0.0006 | 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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0.005 | 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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List I; List II | - | - | ||||||||
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EU Drinking Water standards: A1 waters: 0.001 mg l⁻¹, A2 waters 0.0025 mg l⁻¹, A3 waters: 0.005 mg l⁻¹ EU Directive for the protection of shelfish intended for human consumption: 100 µg l⁻¹ |
B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) UK EA QS database 20185 = Verified data used for regulatory purposes |
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Health issues |
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Highly toxic Possible brain toxicant USEPA - possible human carcinogen |
Handling issues |
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IMDG Transport Code is usually 6.1 | |||
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Health: H300, H311, H330, H372 Environment: H400, H410 |
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T+ - Very toxic: R26/28 T - Toxic: R24, R48/25 N - Dangerous for the environment: R50, R53 |
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S1/2, S28, S36/37, S45, S60, S61 | |||
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Ia (Extremely hazardous) | |||
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3018 | |||
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Packaging Group I (great danger) |
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parathion-ethyl | ||
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parathion | ||
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Parathion | ||
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parathion | ||
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paration | ||
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paratión | ||
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parathion | ||
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paration | ||
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parathion |
Record last updated: | 27/11/2019 |
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 |