Dithiopyr

Structural formula
General
Surname	Dithiopyr
other names	S 3 , S 5 -dimethyl-2- (difluoromethyl) -4-isobutyl-6- (trifluoromethyl) pyridine-3,5-dicarbothioate dimension
Molecular formula	C 15 H 16 F 5 NO 2 S 2
Brief description	colorless crystals
External identifiers / databases
CAS number 97886-45-8 EC number 619-297-9 ECHA InfoCard 100.131.988 PubChem 91757 Wikidata Q5283665
properties
Molar mass	401.42 g mol −1
Physical state	firmly
Melting point	65 ° C
solubility	practically insoluble in water (0.7 mg l −1 at 20 ° C)
safety instructions
GHS hazard labeling no classification available
Toxicological data	> 5000 mg kg −1 ( LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Dithiopyr is a chemical compound from the pyridines group and a herbicide developed by Monsanto in the late 1980s.

Extraction and presentation

Dithiopyr can be obtained by a multistage reaction starting from ethyl trifluoroacetoacetate and isovaleraldehyde .

use

Dithiopyr acts as a microtubule inhibitor and is used as a selective herbicide against grass weeds and broad-leaved weeds in lawns and ornamental trees.

Admission

No plant protection products containing this active ingredient are permitted in the EU or Switzerland .

Individual evidence

1. ↑ ^{a b c d e f} Entry on Dithiopyr. In: Römpp Online . Georg Thieme Verlag, accessed on May 22, 2014.
2. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
3. ↑ Thomas A. Unger: Pesticide Synthesis Handbook . William Andrew, 1996, ISBN 0-8155-1853-6 , pp. 531 ( limited preview in Google Book search).
4. ^ Directorate-General for Health and Food Safety of the European Commission: Entry on dithiopyr in the EU pesticide database; Entry in the national registers of plant protection products in Switzerland , Austria and Germany ; accessed on March 26, 2016.