Chlorobenzilate
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| General | ||||||||||||||||
| Surname | Chlorobenzilate | |||||||||||||||
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| Molecular formula | C 16 H 14 Cl 2 O 3 | |||||||||||||||
| Brief description |
yellowish solid, technical product often as a brown oil |
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| properties | ||||||||||||||||
| Molar mass | 325.19 g mol −1 | |||||||||||||||
| Physical state |
firmly |
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| density |
1.2816 g cm −3 |
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| Melting point |
36-37.5 ° C |
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| boiling point |
146–148 ° C (at 0.053 hPa ) |
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | ||||||||||||||||
Chlorobenzilate is a chemical compound from the group of benzilic acids that is used as an acaricide .
Extraction and presentation
Chlorobenzilate can be obtained from toluene , which is chlorinated and then reacts with sodium hydroxide to form 4-chlorobenzaldehyde . This reacts with sodium cyanide and ethanol to form 4,4'-dichlorobenzoin , which reacts with nitric acid to form 4,4'-dichlorobenzil . Reaction with potassium hydroxide and ethanol or diethyl sulfate now gives the end product.
Admission
No plant protection products containing this active ingredient are permitted in the EU or Switzerland .
Individual evidence
- ↑ US Environmental Protection Agency: Chlorobenzilate. In: Technology Transfer Network - Air Toxics Web Site. Retrieved June 24, 2014 .
- ↑ a b c d e f g h Entry on chlorobenzilate in the GESTIS substance database of the IFA , accessed on January 8, 2020(JavaScript required) .
- ↑ Entry on chlorobenzilates in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on August 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
- ↑ Thomas A. Unger: Pesticide Synthesis Handbook . William Andrew, 1996, ISBN 0-8155-1853-6 , pp. 378 ( limited preview in Google Book search).
- ↑ General Directorate Health and Food Safety of the European Commission: Entry on chlorobenzilate in the EU pesticide database; Entry in the national registers of plant protection products in Switzerland , Austria and Germany ; accessed on March 26, 2016.