Chlormequat |
![]() Last updated: 12/01/2021 |
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(Not known by any other names) |
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A plant growth retardant, usually used as the chliride derivative, used on cereals to increase resistance to lodging | |
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Lodging; Cell elongation | |
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Cereals including wheat, triticale, barley, rye; Ornamentals including geraniums, pelargoniums, poinsetta; vegetables including tomatoes, cabbage, cauliflower, radish | |
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Current | |
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1966, Germany |
UK regulatory status |
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Approved | ||
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30/11/2024 | ||
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None |
EC Regulation 1107/2009 (repealing 91/414) |
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Approved | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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UK | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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30/11/2021 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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No | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Australia, USA |
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Chemical structure |
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C₅H₁₃ClN | |
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No data | |
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JUZXDNPBRPUIOR-UHFFFAOYSA-N | |
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InChI=1S/C5H13ClN/c1-7(2,3)5-4-6/h4-5H2,1-3H3/q+1 | |
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Yes |
General status |
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Plant growth regulator | |
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Quarternary ammonium compound | |
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Synthetic | |
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Inhibits cell elongation | |
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7003-89-6 | |
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13836 | |
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122.62 | |
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2-chloro-N,N,N-trimethylethan-1-aminium | |
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(2-chloroethyl)trimethylammonium | |
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2-chloro-N,N,N-trimethylethanaminium | |
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Potential groundwater contaminant | |
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Not applicable | |
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Not applicable | |
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Not applicable | |
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Not applicable | |
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Formulations |
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Usually supplied as a soluble concentrate that is mixed with water and applied as a spray |
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886000 | 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 ) as chloride5 = Verified data used for regulatory purposes |
High | ||||||||
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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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Not expected to self ignite; Not highly flammable | 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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3.39 X 10-04 | Calculated | - | |||||||
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-3.47 | 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 ) as chloride5 = Verified data used for regulatory purposes |
Low | ||||||||
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Not applicable | 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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Complete dissociation | |||||||||||
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Degradation |
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27.4 | 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 ) as chloride5 = Verified data used for regulatory purposes |
Non-persistent | |||||||
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23.2 | 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 ) as chloride5 = Verified data used for regulatory purposes |
Non-persistent | ||||||||
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102.1 | 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 ) as chloride5 = Verified data used for regulatory purposes |
Persistent | ||||||||
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EU dossier lab studies for the chloride derivative DT₅₀ range 17.0-31.6 days, DT₉₀ range 88.9-112.5 days; Confirmatory data DT₅₀ 11.0-44.7 days, soils=7. Other sources: DT₅₀ 14 days (DW3) | ||||||||||
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Soil adsorption and mobility |
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2.04 | 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 ) as chloride5 = Verified data used for regulatory purposes |
Moderately mobile | |||||||
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132 | ||||||||||
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0.74 | ||||||||||
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EU dossier for chloride derivative kf range 0.63-4.57 mL g⁻¹, Kfoc range 54.6-291.1 mL g⁻¹, 1/n range 0.51-0.99, Soils=8 | ||||||||||
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Fate indices |
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2.57 | Calculated | Transition state | ||||||||||||||||||||||||||
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1.39 X 10-01 | Calculated | - | |||||||||||||||||||||||||
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Low | Calculated | - | ||||||||||||||||||||||||||
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Moderately mobile | Calculated | - |
Other known metabolites |
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choline chloride | - | Rat (Urinary) | 0.03 | - |
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115 | 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 as chloride5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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50 | L2 L = Pesticide manuals and hard copy reference books / other sources Rat 2 year as chloride2 = Unverified data of unknown source |
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74 | 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 Reproductive NOAEL as chloride5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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441 | 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 ) Coturnix japonica as chloride5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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> 310 mg kg bw⁻¹ day⁻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 ) Coturnix japonica as chloride5 = Verified data used for regulatory purposes |
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54.8 | 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 ) Coturnix japonica as chloride5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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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 ) Oncorhynchus mykiss as chloride5 = Verified data used for regulatory purposes |
Low | ||||||||
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43.1 | 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 ) Oncorhynchus mykiss as chloride5 = Verified data used for regulatory purposes |
Low | ||||||||
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31.7 | 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 ) Daphnia magna as chloride5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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2.4 | 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 ) Daphnia magna as chloride5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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5.3 | 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 ) Lemna gibba as chloride5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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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 ) Pseudokirchneriella subcapitata as chloride5 = Verified data used for regulatory purposes |
Low | ||||||||
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> 65.2 | 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 ) Apis mellifera as chloride5 = Verified data used for regulatory purposes |
Moderate | |||||||
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> 80.2 | 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 ) Apis mellifera as chloride5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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320 | 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 ) Eisenia foetida as chloride5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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681 | 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 ) Eisenia foetida as chloride5 = Verified data used for regulatory purposes |
Low | ||||||||
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General |
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High (class III) | - | - | ||||||||
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115 | 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 as chloride5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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964 | 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 as chloride5 = Verified data used for regulatory purposes |
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> 5.2 | 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 ) Rat 4 hr (aerosol) as chloride5 = Verified data used for regulatory purposes |
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0.04 | 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=1005 = Verified data used for regulatory purposes |
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0.09 | 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=1005 = Verified data used for regulatory purposes |
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0.04 | 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=1005 = Verified data used for regulatory purposes |
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4.0 | 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 |
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Acceptable risk for bystanders | |||||||||
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Acceptable risk for workers Operators should wear PPC/PPE to protect against potential exposure |
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Health issues |
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Highly toxic |
Handling issues |
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Prevent generation of dust May emit irritating, toxic fumes in a fire Not explosive or oxidising IMDG Transport Code is usually 8 |
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Health: H302, H312 | |||
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Xn - Harmful: R21/22 | |||
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S2, S36/37 | |||
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II (Moderately hazardous) | |||
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Usually 1760 | |||
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Packaging Group III (minor danger) |
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chlormequat | ||
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chlormequat | ||
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Chlormequat | ||
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chlormequat | ||
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clormequat | ||
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clormecuat | ||
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chlormequat | ||
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chloromekwatu | ||
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chlormequat | ||
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chloormequat |
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 |