Bensulfuron-methyl
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Bensulfuron-methyl | |||||||||||||||
other names |
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Molecular formula | C 16 H 18 N 4 O 7 S | |||||||||||||||
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properties | ||||||||||||||||
Molar mass | 410.40 g mol −1 | |||||||||||||||
Physical state |
firmly |
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Melting point |
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solubility |
very heavy in water (0.12 g l −1 at 25 ° C) |
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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 . |
Bensulfuron-methyl is a chemical compound from the group of sulfonylureas , which was introduced by DuPont in 1984 as a herbicide .
Extraction and presentation
Bensulfuron is prepared in a multistage synthesis starting from 2-methylbenzoic acid methyl ester . This is chlorinated; in the next step the intermediate reacts with thiourea and is chlorinated again. By reacting with ammonia , phosgene and adding 2-amino-4,6-dimethoxypyrimidine , bensulfuron is now formed.
use
Bensulfuron-methyl is used as a selective, systemic herbicide in rice cultivation. It works by inhibiting acetolactate synthase .
Admission
In some EU countries, plant protection products with this active ingredient are approved, but not in Germany, Austria or Switzerland.
Individual evidence
- ↑ a b c d e Entry on Bensulfuron-methyl. In: Römpp Online . Georg Thieme Verlag, accessed on March 25, 2014.
- ↑ a b data sheet Bensulfuron-methyl, PESTANAL at Sigma-Aldrich , accessed on May 19, 2017 ( PDF ).
- ↑ Entry on methyl-α - ((4,6-dimethoxypyrimidin-2-yl) ureidosulfonyl) -o-toluate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on March 15, 2017. Manufacturers or distributors can use the expand harmonized classification and labeling .
- ↑ Thomas A. Unger: Pesticide Synthesis Handbook . William Andrew, 1996, ISBN 0-8155-1853-6 , pp. 168 ( limited preview in Google Book search).
- ↑ General Directorate Health and Food Safety of the European Commission: Entry on Bensulfuron in the EU pesticide database ; Entry in the national registers of plant protection products in Switzerland , Austria and Germany ; accessed on March 25, 2016.