2,3,6-TBA (Ref: HC 1281) |
![]() Last updated: 04/01/2021 |
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(Also known as: trichlorobenzoic acid; trichlorobenzene; trichlorobenzyl chloride metabolite; T-2) |
SUMMARY |
2,3,6-TBA is a post-emergence herbicide that does not have EU approval for use. It is highly soluble in water and most organic solvents. It is considered volatile. Little has been reported on its environmental persistence or mobility. It is moderately toxic to mammals and a recognised irritant. Based on its chemical properties it would not expected to bioaccumulate. There are gaps in knowledge regarding its toxicity to biodiversity however data has shown that it is moderately toxic to bids, fish and honeybees. |
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A post-emergence herbicide used to control annual and perennial broad-leaved weeds | |
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Woody weeds including root suckers; Honeysuckle; hemlock; Canada thistle; Adler; Sycamore; Trumpet vine; | |
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Cereals including wheat, barley, oats, field corn; Grass seed crops; Non-crop areas including railroads, rights of way, utility areas | |
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Current | |
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1952, first reported |
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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C₇H₃Cl₃O₂ | |
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C1=CC(=C(C(=C1Cl)C(=O)O)Cl)Cl | |
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No data | |
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XZIDTOHMJBOSOX-UHFFFAOYSA-N | |
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InChI=1S/C7H3Cl3O2/c8-3-1-2-4(9)6(10)5(3)7(11)12/h1-2H,(H,11,12) | |
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Yes |
General status |
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Herbicide | |
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Benzoic acid | |
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>97% | |
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Synthetic | |
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Systemic, absorbed by leaves and roots with auxin type action | |
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50-31-7 | |
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200-026-4 | |
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49 | |
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5759 | |
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225.45 | |
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2,3,6-trichlorobenzoic acid | |
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2,3,6-trichlorobenzoic acid | |
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O | |
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4 | |
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Not applicable | |
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Not applicable | |
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Colourless crystals |
Formulations |
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Usually formulated as an aqueous solution |
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7700 | CA3 CA = Medical and toxicological databases and information systems e.g. TOXNET (click here ) 3 = Unverified data of known source |
High | ||||||||
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607000 | L3 L = Pesticide manuals and hard copy reference books / other sources Acetone3 = Unverified data of known source |
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238000 | L3 L = Pesticide manuals and hard copy reference books / other sources Benzene3 = Unverified data of known source |
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237000 | L3 L = Pesticide manuals and hard copy reference books / other sources Chloroform3 = Unverified data of known source |
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637000 | L3 L = Pesticide manuals and hard copy reference books / other sources Ethanol3 = Unverified data of known source |
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125 | CA3 CA = Medical and toxicological databases and information systems e.g. TOXNET (click here ) 3 = Unverified data of known source |
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Decomposes on distillation | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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5.13 X 1002 | Calculated | - | |||||||
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2.71 | CA2 CA = Medical and toxicological databases and information systems e.g. TOXNET (click here ) 2 = Unverified data of unknown source |
Moderate | ||||||||
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1.687 | DW4 DW = Don Wauchope personal database for Pka data: Wauchope, R. D. and Edwards, J. Dissociation constants for pesticide active ingredients: a database and comparison with predicted values. MS in preparation 4 = Verified data |
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Strong acid | |||||||||||
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73.32 | Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown source |
Highly volatile | ||||||||
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2.15 X 10-03 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) 3 = Unverified data of known source |
Non-volatile | ||||||||
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Degradation |
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Stable | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Stable | |||||||
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Soil adsorption and mobility |
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- | CA2 CA = Medical and toxicological databases and information systems e.g. TOXNET (click here ) 2 = Unverified data of unknown source |
Mobile | |||||||
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65 | ||||||||||
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Estimated | ||||||||||
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Fate indices |
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Cannot be calculated | - | - | |||||||||||||||||||||||||
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Key metabolites |
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Soil | - | - |
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40 | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
Low potential | |||||||
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Not available | - | |||||||||
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> 1500 | CA3 CA = Medical and toxicological databases and information systems e.g. TOXNET (click here ) Rat3 = Unverified data of known source |
Moderate | ||||||||
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1500 | L3 L = Pesticide manuals and hard copy reference books / other sources Gallus gallus3 = Unverified data of known source |
Moderate | ||||||||
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8.5 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Pimephales promelas3 = Unverified data of known source |
Moderate | ||||||||
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> 100 | L2 L = Pesticide manuals and hard copy reference books / other sources 2 = Unverified data of unknown source |
Low | ||||||||
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General |
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High (class III) | - | - | ||||||||
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> 1500 | CA3 CA = Medical and toxicological databases and information systems e.g. TOXNET (click here ) Rat3 = Unverified data of known source |
Moderate | ||||||||
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600 | L3 L = Pesticide manuals and hard copy reference books / other sources Rabbit3 = Unverified data of known source |
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14.0 | AC3 AC = EC Joint Research Centre ESIS European Chemical Substance Information Systems including EINECS, now integrated with the database provided by the European Chemicals Agency (ECHA) (click here ) Rat3 = Unverified data of known source |
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Potentially via inhalation or dermal contact | ||||||||||
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Health issues |
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Over exposure may cause nausea, salivation, tremor and depression |
Handling issues |
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Not compatible with fertilisers | |||
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Health: H302 Environment: H411 |
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Xn - Harmful: R22 N - Dangerous for the environment: R51, R53 |
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S2, S61 | |||
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III (Slightly hazardous) | |||
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2,3,6-TBA | ||
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2,3,6-TBA | ||
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2,3,6-TBA | ||
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2,3,6-TBA | ||
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2,3,6-TBA | ||
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2,3,6-TBA | ||
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2,3,6-TBA | ||
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2,3,6-TBA | ||
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2,3,6-TBA | ||
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2,3,6-TBA | ||
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2,3,6-TBA |
Record last updated: | 04/01/2021 |
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 |