Dimethyl tetrachloride terephthalate
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Dimethyl tetrachloride terephthalate | |||||||||||||||
other names |
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Molecular formula | C 10 H 6 Cl 4 O 4 | |||||||||||||||
Brief description |
dirty white to light brown grains with a faint aromatic odor |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 331.96 g mol −1 | |||||||||||||||
Physical state |
firmly |
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Melting point |
155-156 ° C |
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boiling point |
decomposes at 360-370 ° C |
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Vapor pressure |
0.00021 Pa (25 ° C) |
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solubility |
practically insoluble in water (0.005 g l −1 ) |
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safety instructions | ||||||||||||||||
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Toxicological data | ||||||||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Dimethyl tetrachloroterephthalate (chlorothal-dimethyl) is a chemical compound from the group of esters of dicarboxylic acids . Chlorthal-dimethyl is a pre-emergence herbicide that works by inhibiting microtubules.
Extraction and presentation
Chlorthal-dimethyl can be obtained by reacting terephthalic acid with thionyl chloride , chlorine and methanol .
Admission
In 2009, the EU Commission decided not to include it in the list of approved active ingredients in pesticides. The sale period ended on September 30, 2010. In Germany, Austria and Switzerland no pesticides containing dimethyl tetrachloride terephthalate are permitted.
Individual evidence
- ↑ a b c d Safety data sheet for DACTHAL 900 WG ( Memento from February 16, 2014 in the Internet Archive ) (PDF; 19 kB) on cropcare.com.au
- ↑ Data sheet Chlorthal-dimethyl, PESTANAL at Sigma-Aldrich , accessed on May 9, 2017 ( PDF ).
- ↑ a b Entry on Dacthal at ChemicalBook , accessed on August 22, 2013.
- ↑ Dimethyl Tetrachloroterephthalate (DCPA) Pesticide Management Plan. (PDF; 263 kB) Idaho State Department of Agriculture, June 2007, accessed on July 13, 2017 (English).
- ↑ a b Data sheet Dimethyl tetrachloroterephthalate, 97% from AlfaAesar, accessed on November 1, 2016 ( PDF )(JavaScript required) .
- ↑ Thomas A. Unger: Pesticide Synthesis Handbook . William Andrew, 1996, ISBN 0-8155-1853-6 , pp. 787 ( limited preview in Google Book search).
- ↑ 2009/715 / EG: Commission decision of 23 September 2009 (PDF) on the non-inclusion of chlorthal-dimethyl in Annex I of Council Directive 91/414 / EEC and the revocation of the approvals for plant protection products with this active substance (announced under file number K (2009) 6431).
- ↑ General Directorate Health and Food Safety of the European Commission: Entry on Chlorthal-dimethyl in the EU pesticide database; Entry in the national registers of plant protection products in Switzerland , Austria and Germany ; Retrieved February 19, 2016.