Metam-potassium |
Last updated: 15/06/2024 |
(Not known by any other names) |
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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A multi-action crop protection agent used as a pre-planting soil sterilant | |
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Weed and disease suppression including control of annual bluegrass, chickweed, ragweed, nutgrass, morning glory, Sclerotina, club root and Rhizoctonia | |
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Vegetables; Fruit; Ornamentals; Fiber crops; Cover crops; Leafy salads | |
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Efficacy is well established via extensive use and field trials | |
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- | |
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1951, first reported |
UK regulatory status |
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Approved | ||
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30/06/2025 | ||
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No data |
EC Regulation 1107/2009 (repealing 91/414) |
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Approved | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Belgium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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30/11/2025 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes - low ADI / ARfD / AOEL | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Additional information |
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Morocco |
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Chemical structure |
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None | |
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C₂H₄KNS₂ | |
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CNC(=S)[S-].[K+] | |
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No data | |
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DQRQIQZHRCRSDB-UHFFFAOYSA-M | |
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InChI=1S/C2H5NS2.K/c1-3-2(4)5;/h1H3,(H2,3,4,5);/q;+1/p-1 | |
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Yes |
General status |
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Fungicide, Insecticide, Nematicide, Soil sterilent | |
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Carbamate fungicide; Dithiocarbamate fungicide; Carbamate herbicide; Dithiocarbamate herbicide; Carbamate nematicide; Dithiocarbamate nematicide | |
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[EU 2023 dossier - N,N’-dimethylthiourea 6.4 g kg⁻¹] | |
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- | |
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Synthetic | |
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Soil fumigant, binds to oxygen carrying molecules and prevents tissues from using oxygen. Multi-site activity. | |
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137-41-7 | |
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205-292-5 | |
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20.019 | |
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039002 | |
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23690432 | |
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No data found | |
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145.28 | |
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potassium methylcarbamodithioate | |
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postassium methylcarbamodithioate | |
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potassium N-methylcarbamodithioate | |
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PAN Bad Actor Chemical; Marine pollutant | |
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- | |
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A/C1 | |
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1/5 | |
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8F | |
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M03 | |
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Colourless to pale yellow crystalline solid | |
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Formulations |
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Usually supplied formulated for use as a fumigant |
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722000 | Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source |
High | ||||||||
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22280 | 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 ) Acetone5 = Verified data used for regulatory purposes |
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2.44 | 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 ) Heptane5 = Verified data used for regulatory purposes |
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13.0 | 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 ) Toluene5 = Verified data used for regulatory purposes |
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69320 | 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 ) Methanol5 = Verified data used for regulatory purposes |
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Decomposes before melting | 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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Decomposes before boiling | 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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150 | 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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100 | 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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4.17 X 1002 | Calculated | - | |||||||
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2.62 | 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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57.5 | 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 ) as sodium variant4 = Verified data |
Highly volatile. If applied directly to plants or soil, drift is a concern & mitigation is advisable | ||||||||
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Neutral soln: 282nm=6014, 250nm=4837, 207 nm=4373 Basic soln: 282nm=6451, 250nm=5204, 217nm=4938 Acidic soln: 267nm=5282, 235nm=3712, 211nm=4120 |
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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Not readily biodegradable | ||||||||||
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0.01 | 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 ) 4 = Verified data |
Non-persistent | |||||||
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0.01 | 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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0.01 | 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 Dossier lab studies DT₅₀ range 4-22 minutes, DT₉₀ range 13-72 minutes; Other sources: up to 7 days | ||||||||||
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1.0 | 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 ) 4 = Verified data |
Fast | ||||||||
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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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- | A3 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 ) 3 = Unverified data of known source |
Mobile | |||||||
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20 | ||||||||||
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EU 2023 dossier data | ||||||||||
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Fate indices |
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-5.40 | Calculated | Low leachability | ||||||||||||||||||||||||||
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2.19 X 10-05 | Calculated | - | |||||||||||||||||||||||||
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Low | Calculated | - | ||||||||||||||||||||||||||
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Mobile | Calculated | - | ||||||||||||||||||||||||||
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Known soil metabolites |
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Major fraction | 0.829 | - |
Known groundwater metabolites |
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Relevant | 0.004 | 24 |
Other known metabolites |
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methyl isothiocyanate (Ref: SN-32866) | MITC | Water; Sediment | - |
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Terrestrial ecotoxicology |
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896 | 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 ) Rat as metam5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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> 211 | A3 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 virginianus> as metam-sodium3 = Unverified data of known source |
Moderate | ||||||||
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> 400 | A2 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 foetida as metam-sodium2 = Unverified data of unknown source |
Moderate | ||||||||
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Aquatic ecotoxicology |
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> 54.0 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment ) Oncorhynchus mykiss4 = Verified data |
Moderate | ||||||||
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> 6.34 | 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 ) Daphnia magna4 = Verified data |
Moderate | ||||||||
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2.19 | 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 ) Americamysis bahia EC₅₀5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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General |
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High (class III) | - | - | ||||||||
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896 | 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 ) Rat as metam5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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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 |
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2.54 | 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 ) Rat 4 hr (whole body)5 = Verified data used for regulatory purposes |
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0.001 | 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 ) Dog SF=100 as metam5 = Verified data used for regulatory purposes |
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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 ) Rat SF=100 as metam5 = Verified data used for regulatory purposes |
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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 ) Rabbit SF=100 as metam5 = Verified data used for regulatory purposes |
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0.001 | 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 ) Dog SF=100 as metam5 = Verified data used for regulatory purposes |
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GB MRL levels for some commodities subject to change in late 2021 | ||||||||||
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Mainly eliminated via urine (85%) with remainder via expelled air | 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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Health issues |
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Highly toxic US EPA - probable human carcinogen, CLP data - suspected carcinogen Possible liver toxicant |
Handling issues |
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Corrosive May liberate toxic gas when in contact with acids Not explosive or oxidising IMDG Transport Hazard Class 6.1 Not likely to auto-ignite |
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Health: H372, H371, H361d, H351, H341, H332, H302, H314, H317 Environment: H400, H410 Handling: H290 |
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II (Moderately hazardous) | |||
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UN2757 | |||
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Spilled product is a hazardous waste and disposal must be at an approved manner Packaging Group I (great danger) |
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metam-potassium | ||
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Record last updated: | 15/06/2024 |
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 |