Chlorthal-dimethyl (Ref: DAC 893) |
![]() Last updated: 23/12/2020 |
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(Also known as: dimethyl tetrachloroterephthalate; DCPA; dacthal) |
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A residual benzoic acid herbicide for pre-emergent control of annual grasses and some annual broad-leaved weeds | |
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Barnyardgrass; Bindweed; Nightshade; Chickweed; Crabgrass; Fat-hen; Pigweed; Redshank; Fescue; Stinging nettle; Petty spurge; Ryegrass | |
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Vegetables including brassicas, peas & beans, onions, carrots, turnips; Strawberries; Cotton; Lucerne; Ornamentals; Lawns | |
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Current | |
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circa 1960 |
UK regulatory status |
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Not approved | ||
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Expired | ||
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None |
EC Regulation 1107/2009 (repealing 91/414) |
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Not approved | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Greece | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Expired | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Australia |
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Chemical structure |
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C₈H₆Cl₄O₄ | |
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COC(=O)C1=C(C(=C(C(=C1Cl)Cl)C(=O)OC)Cl)Cl | |
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No data | |
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NPOJQCVWMSKXDN-UHFFFAOYSA-N | |
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InChI=1S/C10H6Cl4O4/c1-17-9(15)3-5(11)7(13)4(10(16)18-2)8(14)6(3)12/h1-2H3 | |
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Yes |
General status |
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Herbicide | |
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Benzenedicarboxylic acid | |
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Synthetic | |
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Selective, non-systemic, acts by inhibiting seed germination. Microtubule assembly inhibition. | |
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1861-32-1 | |
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217-464-7 | |
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328 | |
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078701 | |
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2943 | |
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331.96 | |
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dimethyl 2,3,5,6-tetrachlorobenzene-1,4-dicarboxylate | |
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dimethyl tetrachloroterephthalate | |
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dimethyl 2,3,5,6-tetrachloro-1,4-benzenedicarboxylate | |
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Chemical subject to PIC regulations | |
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K1 | |
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3 | |
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Not applicable | |
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Not applicable | |
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- | |
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Colourless to grey crystalline powder | |
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Formulations |
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Usually supplied as a wettable powder or granular formulation |
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0.21 | 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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250000 | L3 L = Pesticide manuals and hard copy reference books / other sources Benzene3 = Unverified data of known source |
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170000 | L3 L = Pesticide manuals and hard copy reference books / other sources Toluene3 = Unverified data of known source |
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140000 | L3 L = Pesticide manuals and hard copy reference books / other sources Xylene3 = Unverified data of known source |
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100000 | L3 L = Pesticide manuals and hard copy reference books / other sources Acetone3 = Unverified data of known source |
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156 | 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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345 | 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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360 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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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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1.91 X 1004 | Calculated | - | |||||||
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4.28 | 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 |
High | ||||||||
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1.56 | Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown source |
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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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No dissociation | |||||||||||
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0.21 | 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 volatility | ||||||||
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0.3486 | 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 |
Moderately volatile | ||||||||
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212.4nm = 48000, 296.6nm = 1240, 290nm = 1030, 295nm = 1210, 304nm = 659, 314nm = 93.1 | 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 ) 5 = Verified data used for regulatory purposes |
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Degradation |
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59 | 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 |
Moderately persistent | |||||||
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59 | 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 |
Moderately persistent | ||||||||
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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 ) 5 = Verified data used for regulatory purposes |
Moderately persistent | ||||||||
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88 | 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 |
Moderately persistent | ||||||||
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156 | 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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EU dossier Lab studies DT₅₀ range 25-97 days, DT₉₀ range 65-166 days, Field studies DT₅₀ range 6-98 days, DT₉₀ range 20-328 days; Other sources: DT₅₀ 33.8 days (R4); 11-105 days (R4) | ||||||||||
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37.8 | R3 R = Peer reviewed scientific publications 3 = Unverified data of known source |
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Kentucky bluegrass thatch, n=1 | ||||||||||
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Stable | 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 |
Stable | |||||||
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Stable | 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 |
Stable | |||||||
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39 | 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 |
Moderately fast | ||||||||
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130 | 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 |
Stable |
Soil adsorption and mobility |
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37.0 | 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 |
Slightly mobile | |||||||
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2963 | ||||||||||
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EU dossier Kd range 6.80-59.5 mL g⁻¹, Koc range 1500-4444 mL g⁻¹, Soils=8 | ||||||||||
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30.5 | 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 |
Slightly mobile | |||||||
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2683 | ||||||||||
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0.947 | ||||||||||
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EU dossier Kf range 6.67-70.3 mL g⁻¹, Kfoc range 1778-4375 mL g⁻¹, 1/n range 0.912-0.985, Soils=8 | ||||||||||
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Fate indices |
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0.96 | Calculated | Low leachability | ||||||||||||||||||||||||||
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1.88 X 10-02 | Calculated | - | |||||||||||||||||||||||||
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High | Calculated | - | ||||||||||||||||||||||||||
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Slightly mobile | Calculated | - |
Key metabolites |
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Soil | 0.944 | Relevant, Major fraction | |||||
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Soil | 0.113 | Relevant, Major fraction |
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2574 | 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 |
Threshold for concern | |||||||
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14 | - | |||||||||
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> 5000 | 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 |
Low | ||||||||
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1 | L2 L = Pesticide manuals and hard copy reference books / other sources Rat 2 year2 = Unverified data of unknown source |
High | |||||||
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> 2250 | 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 ) Colinus virginianus5 = Verified data used for regulatory purposes |
Low | ||||||||
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> 1637 mg/Kg BW/day | 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 ) Colinus virginianus5 = Verified data used for regulatory purposes |
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> 4.7 | 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 ) Oncorhynchus mykiss5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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0.056 | 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 mykiss5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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> 4.6 | 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 magna5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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0.246 | 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 magna5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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> 11 | 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 gibba5 = Verified data used for regulatory purposes |
Low | ||||||||
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> 10 | F5 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Scenedemus subspicatus5 = Verified data used for regulatory purposes |
Low | ||||||||
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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 |
Low | |||||||
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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 |
Low | ||||||||
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> 500 | 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 corr5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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485 | 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 ) Aphidius rhopalosiphi5 = Verified data used for regulatory purposes |
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40000 | > 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 ) Typhlodromus pyri5 = Verified data used for regulatory purposes |
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General |
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High (class III) | - | - | ||||||||
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> 5000 | 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 |
Low | ||||||||
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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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> 4.48 | 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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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 ) Rat SF=1005 = Verified data used for regulatory purposes |
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0.5 | 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=1005 = Verified data used for regulatory purposes |
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None allocated | 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 SF=1004 = Verified data |
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6-8 | 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 ) concentration dependent5 = Verified data used for regulatory purposes |
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Negligible risk to the public | |||||||||
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Acceptable risk with PPE/PPC | ||||||||||
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Health issues |
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Possible liver, thyroid & lung toxicant USEPA - possible human carcinogen |
Handling issues |
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Not explosive or oxidising | |||
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Environment: H400, H410 | |||
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Xn - Harmful: R22 Xi - Irritant: R36/38 |
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S22, S26, S36/37 | |||
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III (Slightly hazardous) | |||
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2811 | |||
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chlorthal-dimethyl | ||
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chlorthal-dimethyle | ||
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Chlorthal-dimethyl | ||
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chlorthal-dimethyl | ||
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clortal-dimetile | ||
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clortal-dimetil | ||
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chlortal dimetylowy | ||
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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 |