Mepiquat |
![]() Last updated: 12/01/2021 |
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(Also known as: mepiquat ion) |
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A plant growth regulator used to reduce vegetative growth. It is usually used as the chloride salt. | |
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Growth | |
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Creals including wheat, oats, barley, rye, triticale; Grass; Onions; Leeks; Garlic | |
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Current | |
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1980 |
UK regulatory status |
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Approved | ||
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28/02/2024 | ||
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None (may vary with mixtures) |
EC Regulation 1107/2009 (repealing 91/414) |
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Approved | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finland/Estonia | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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28/02/2021 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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No | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Australia |
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Chemical structure |
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No | |
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C₇H₁₆N | |
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C[N+]1(CCCCC1)C | |
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No data | |
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NNCAWEWCFVZOGF-UHFFFAOYSA-N | |
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InChI=1S/C7H16N/c1-8(2)6-4-3-5-7-8/h3-7H2,1-2H3/q+1 | |
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Yes |
General status |
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Plant growth regulator, Herbicide | |
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Quarternary ammonium compound | |
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Synthetic | |
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Inhibits biosynthesis of gibberellic acid | |
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15302-91-7 | |
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18743 | |
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114.21 | |
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1,1-dimethylpiperidin-1-ium | |
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1,1-dimethylpiperidinium | |
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1,1-dimethylpiperidinium | |
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None allocated | |
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None allocated | |
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Not applicable | |
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Not applicable | |
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Solid | |
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Formulations |
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2.82 X 10-04 | Calculated | - | |||||||
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-3.55 | 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 acid4 = Verified data |
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Degradation |
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3.6 | R4 R = Peer reviewed scientific publications 4 = Verified data |
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Published literature RL₅₀ range 2.8-4.3, 2 field crops, whole plant matrix, n=2 | ||||||||||
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Soil adsorption and mobility |
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Fate indices |
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2.0 | 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 ) as acid4 = Verified data |
Low potential | |||||||
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1490 | 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 |
Moderate | ||||||||
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> 155 | 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 ) Rat Reproductive NOAEL as chloride variant4 = Verified data |
Moderate | ||||||||
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> 2000 | 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 ) Colinus virginianus as chloride variant4 = Verified data |
Low | ||||||||
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> 100.7 | 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 ) Coturnix japonica NOAEL as chloride variant4 = Verified data |
Moderate | ||||||||
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> 100 | 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 ) Oncorhynchus mykiss as chloride variant4 = Verified data |
Low | ||||||||
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100 | 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 ) Oncorhynchus mykiss as chloride variant4 = Verified data |
Low | ||||||||
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68.5 | 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 ) Daphnia magna as chloride variant4 = Verified data |
Moderate | ||||||||
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12.5 | 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 ) Daphnia magna as chloride variant4 = Verified data |
Low | ||||||||
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15.4 | 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 ) Lemna gibba as chloride variant5 = Verified data used for regulatory purposes |
Low | ||||||||
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> 44.8 | 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 ) Aphanizomenon flos-aquae as chloride variant5 = Verified data used for regulatory purposes |
Low | ||||||||
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14.4 | 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 ) Aphanizomenon flos-aquae as chloride variant5 = Verified data used for regulatory purposes |
Low | ||||||||
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> 100 | 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 chloride variant4 = Verified data |
Low | |||||||
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> 107.4 | 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 chloride variant4 = Verified data |
Low | ||||||||
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> 3195 | 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 ) Eisenia foetida as chloride variant4 = Verified data |
Low | ||||||||
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31.25 | 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 ) Eisenia foetida as chloride variant4 = Verified data |
Moderate | ||||||||
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General |
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High (class III) | - | - | ||||||||
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1490 | 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 |
Moderate | ||||||||
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0.2 | 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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0.3 | 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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0.3 | 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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Minimal risk from dietary exposure Risk assessment indicates ARfD would not normally be exceded |
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Risk of exposure acceptable under label recommendations for use for personal protection clothing and equipment | ||||||||||
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Health issues |
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Moderately toxic |
Handling issues |
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Prevent generation of mists | |||
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Health: H302 Environment: H412 |
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Xn - Harmful: R22 N - Dangerous for the environment: R52, R53 |
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S2, S61 | |||
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II (Moderately hazardous) | |||
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mepiquat | ||
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mepiquat | ||
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Mepiquat | ||
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mepiquat | ||
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mepiquat | ||
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mepicuat | ||
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mepikwatu | ||
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mepikvat | ||
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Record last updated: | 12/01/2021 |
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 |