Demeton-S-methyl |
![]() Last updated: 23/12/2020 |
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(Also known as: methyl-mercaptophos-teolovy; methyl demeton; mercapthphos) |
SUMMARY |
Demeton-S-methyl is an insecticide not approved for use in the EU. It is highly soluble in water, volatile and, based on its physico-chemical data, it is not expected to leach to groundwater. It is not persistent in soil systems. Demeton-S-methyl is highly toxic to mammals, a cholinesterase inhibitor, a neurotoxin and a recognised irritant. It is highly toxic to birds, aquatic invertebrates and honey bees and moderately toxic to most other species including fish and earthworms. |
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An insecticide used to control aphids and other sucking insects on a range of crops | |
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Aphids including woolly aphids, citrus aphids, Russian aphids; Sawflies; Bryobia mites; Lacebugs | |
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Vegetables including beans, peas, brassicas, peppers, aubergines, onions; Fruit including olives, peaches, plums, apricots; Tomatoes; Cotton; Peanuts; Wheat; Maize; Sorghum | |
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Unknown | |
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1957 |
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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Chemical structure |
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The methyl ester of the S-form of isomeric demeton | |
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C₆H₁₅O₃PS₂ | |
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CCSCCSP(=O)(OC)OC | |
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No data | |
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WEBQKRLKWNIYKK-UHFFFAOYSA-N | |
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InChI=1S/C6H15O3PS2/c1-4-11-5-6-12-10(7,8-2)9-3/h4-6H2,1-3H3 | |
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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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- | |
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Synthetic | |
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Systemic with contact and stomach action. Acetylcholinesterase (AChE) inhibitor. | |
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919-86-8 | |
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213-052-6 | |
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47 | |
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- | |
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13526 | |
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230.29 | |
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S-[2-(ethylsulfanyl)ethyl] O,O-dimethyl phosphorothioate | |
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S-2-ethylthioethyl O,O-dimethyl phosphorothioate | |
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S-(2-(ethylthio)ethyl) O,O-dimethyl phosphorothioate | |
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Pan Bad Actor | |
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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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Aphis gossypii, Panonychus ulmi, Tetranychus urticae, Tetranychus viennensis, Aculus cornutus, Aphis craccivora, many others | |
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Yellow oil |
Formulations |
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Usually supplied as an emulsifiable concentrate. |
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22000 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
High | ||||||||
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2.09 X 1001 | Calculated | - | |||||||
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1.32 | G4 G = Extension Toxicology network database EXTOXNET (click here ) 4 = Verified data |
Low | ||||||||
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1.21 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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40 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Highly volatile | ||||||||
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4.19 X 10-04 | 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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2.7 | K4 K = Research datasets, e.g. Pandora, Demetra 4 = Verified data |
Non-persistent | |||||||
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2.7 | K4 K = Research datasets, e.g. Pandora, Demetra 4 = Verified data |
Non-persistent | ||||||||
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3.0 | R3 R = Peer reviewed scientific publications 3 = Unverified data of known source |
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Mango fruit, n=1 | ||||||||||
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56 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Moderately persistent | |||||||
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pH sensitive: DT₅₀ 63 days at pH 4, 8 days at pH 9 all at 22 °C | ||||||||||
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Soil adsorption and mobility |
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- | W3 W = French database provided by ARVALIS-Institut du Végétal 3 = Unverified data of known source |
Moderately mobile | |||||||
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90 | ||||||||||
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Fate indices |
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0.88 | Calculated | Low leachability | ||||||||||||||||||||||||||
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1.95 X 10-03 | Calculated | - | |||||||||||||||||||||||||
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Low | Calculated | - | ||||||||||||||||||||||||||
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Moderately mobile | Calculated | - |
Key metabolites |
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Animal | - | - |
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0.5 | R3 R = Peer reviewed scientific publications (LogP < 3)3 = Unverified data of known source |
Low potential | |||||||
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Not available | - | |||||||||
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40 | 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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- | L2 L = Pesticide manuals and hard copy reference books / other sources Rat 2 year2 = Unverified data of unknown source |
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1 | - | |||||||||
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44 | L3 L = Pesticide manuals and hard copy reference books / other sources Coturnix japonica3 = Unverified data of known source |
High | ||||||||
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> 6.4 | L3 L = Pesticide manuals and hard copy reference books / other sources Oncorhynchus mykiss3 = Unverified data of known source |
Moderate | ||||||||
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> 0.023 | L3 L = Pesticide manuals and hard copy reference books / other sources Daphnia magna3 = Unverified data of known source |
High | ||||||||
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22.1 | L3 L = Pesticide manuals and hard copy reference books / other sources Scenedemus subspicatus3 = Unverified data of known source |
Low | ||||||||
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10 | Q2 Q = Miscellaneous internet resources Unknown species2 = Unverified data of unknown source |
Low | ||||||||
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2.6 | F3 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 24hr3 = Unverified data of known source |
Moderate | |||||||
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> 0.19 | K4 K = Research datasets, e.g. Pandora, Demetra Apis mellifera4 = Verified data |
High | ||||||||
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> 2.68 | R4 R = Peer reviewed scientific publications Bombus terrestris 48 hr4 = Verified data |
Moderate | |||||||
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0.076 | R4 R = Peer reviewed scientific publications Megachile rotundata4 = Verified data |
High | |||||||
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Contact | ||||||||||
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> 250 | L3 L = Pesticide manuals and hard copy reference books / other sources Eisenia foetida3 = Unverified data of known source |
Moderate | ||||||||
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Harmless | 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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40 | 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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30 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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0.13 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat (aerosol)3 = Unverified data of known source |
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0.0003 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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List I; List II | - | - | ||||||||
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Health issues |
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No further information available |
Handling issues |
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Combustible | |||
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Health: H301, H311 Environment: H411 |
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T - Toxic: R24/25 N - Dangerous for the environment: R51, R53 |
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S1/2, S28, S36/37, S45, S61 | |||
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Ib (Highly hazardous / Highly hazardous) | |||
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Usually 3018 | |||
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demeton-S-methyl | ||
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demeton-S-methyle | ||
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Demeton-S-methyl | ||
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demeton-S-methyl | ||
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demeton-s-metil | ||
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demeton-S-metil | ||
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demeton-S-methyl | ||
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demeton-S-metylowy | ||
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demeton-S-methyl |
Record last updated: | 23/12/2020 |
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 |