Benfluralin is a selective pre-emergence herbicide derived from dinitroaniline.
| Benfluralin | |
|---|---|
 | |
| General | |
| Systematic name | N-Butyl-N-ethyl-2,6-dinitro-4- (trifluoromethyl) aniline |
| Chem. formula | C 13 H 16 F 3 N 3 O 4 |
| Physical properties | |
| Molar mass | 335.28 g / mol |
| Density | 1,338 g / cm³ |
| Thermal properties | |
| T. melt. | 65–66.5 ° C |
| T. bale. | (0.6 mbar) 121–122 ° C |
| Steam pressure | 0.000519 hPa (30 ° C) [1] |
| Chemical properties | |
| Solubility in water | practically insoluble (<1 mg · l −1 ) [2] |
| Classification | |
| Reg. CAS number | |
| PubChem | |
| Reg. EINECS number | |
| Smiles | |
| Inchi | |
| Chebi | |
| ChemSpider | |
| Security | |
| LD 50 | 10,000 mg · kg −1 (rat, oral) [2] |
| R phrases | R50 / 53 |
| S-phrases | S22 S24 / 25 S60 S61 |
| H phrases | H410 |
| P-phrases | P273 , P501 |
| GHS icons |  |
Content
- 1 Synthesis
- 2 Features
- 3 Use
- 4 Approval
- 5 See also
- 6 notes
Synthesis
Benfluralin is synthesized by nitration of 4-chlorobenzotrifluoride and subsequent reaction with N- ethylbutylamine [3] .
Features
Flammable orange crystalline substance, practically insoluble in water [2] . Stable in pH range from 5 to 9, but sensitive to light. When dry, it does not corrode metals, but in the presence of water it can cause corrosion, especially aluminum [4] .
Usage
It is used as a post-emergence herbicide [2] . It is a selective soil herbicide that well suppresses some cereals and dicotyledonous plants; Malvaceae are resistant to the drug. Used in the cultivation of peanuts, lettuce, cucumber, chicory, endive , field beans, asparagus beans, lentils, alfalfa, clover, tobacco and lawn care. It is absorbed through the roots and reduces seed germination, preventing the growth of weeds by inhibiting the development of roots and stems [5] . It inhibits the formation of microtubules [4] .
Nontoxic to bees and other insects. Due to the high toxicity to fish when using the drug, it is necessary to take measures that exclude the possibility of its ingress into fish-breeding ponds.
Approval
In some EU countries, benfluralin is approved as an active ingredient in plant protection products, but it is not used in Germany, Austria and Switzerland [6] .
See also
- Trifluralin
Notes
- ↑ Datenblatt Benfluralin bei Sigma-Aldrich , abgerufen am 1. Juni 2011 ( PDF ).
- ↑ 1 2 3 4 Record of CAS RN 1861-40-1 in the GESTIS Substance Database of the IFA .
- ↑ Ullmann's Agrochemicals, Band 1, S. 802; ISBN 978-3-527-31604-5 .
- ↑ 1 2 Terence Robert Roberts, David Herd Hutson; Metabolic pathways of agrochemicals, Teil 2, S. 245ff; ISBN 978-0854044948 .
- ↑ Globachem: Benfluralin Archived March 15, 2014.
- ↑ Generaldirektion Gesundheit und Lebensmittelsicherheit der Europäischen Kommission: Eintrag zu Benfluralin in der EU-Pestiziddatenbank ; Eintrag in den nationalen Pflanzenschutzmittelverzeichnissen der Schweiz , Österreichs Archived April 22, 2016 at Wayback Machine und Deutschlands ; abgerufen am 12.