Bispyribac sodium
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| General | |||||||||||||||||||
| Surname | Bispyribac sodium | ||||||||||||||||||
| other names |
Sodium 2,6-bis [(4,6-dimethoxy-2-pyrimidinyl) oxy] benzoate ( IUPAC ) |
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| Molecular formula | C 19 H 17 N 4 NaO 8 | ||||||||||||||||||
| Brief description |
White dust |
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| properties | |||||||||||||||||||
| Molar mass | 452.35 g mol −1 | ||||||||||||||||||
| Physical state |
firmly |
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| Melting point |
223-224 ° C |
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| solubility |
soluble in water (73.3 g l −1 at 20 ° C) |
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | |||||||||||||||||||
Bispyribac sodium is a chemical compound from the group of pyrimidines and benzoic acid esters and a herbicide jointly developed by Kumiai and Ihara Chemical Industries and introduced in 1997 .
Extraction and presentation
Bispyribac sodium can be obtained by reacting benzyl-2,6-dihydroxybenzoate with 2-methylsulfonyl-4,6-dimethoxypyrimidine (DMSP) and subsequent hydrogenation . An alternative method starts from 2-chloro-4,6-dimethoxypyrimidine .
use
Bispyribac sodium is a systemic post-emergence herbicide with high selectivity for direct-sown rice. It works by inhibiting acetolactate synthase .
Admission
In some EU countries, plant protection products with this active ingredient have been approved since August 1, 2011, but not in Germany, Austria or Switzerland.
Individual evidence
- ↑ a b c d Entry on bispyribac sodium. In: Römpp Online . Georg Thieme Verlag, accessed on May 15, 2014.
- ↑ a b Data sheet Bispyribac sodium salt from Sigma-Aldrich , accessed on May 22, 2017 ( PDF ).
- ↑ a b Wolfgang Krämer, Ulrich Schirmer, Peter Jeschke, Matthias Witschel: Modern Crop Protection Compounds: Herbicides, Volume 1 . Wiley-VCH, 2011, ISBN 978-3-527-32965-6 , pp. 123–126 ( limited preview in Google Book search).
- ↑ Patent CN101265235 : Method for preparing herbicide bispyribac-sodium. Registered on May 8, 2008 , published on April 25, 2012 , Applicants: Shanghai Jiaotong University , Inventors: Li Shaoshun, Ji Yejun, Xu Defeng.
- ↑ K. Toriyama, KL Heong, B. Hardy (eds.): Rice is Life Scientific Perspectives for the 21st Century . IRRI , 2005, pp. 215 ( limited preview in Google Book search).
- ^ Directorate-General for Health and Food Safety of the European Commission: Entry on Bispyribac in the EU pesticide database ; Entry in the national registers of plant protection products in Switzerland , Austria and Germany ; accessed on March 25, 2016.