Quinomethionate

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Structural formula
Structural formula of quinomethionate
General
Surname Quinomethionate
other names
  • 6-methyl-1,3-dithiolo [ 4,5- b ] quinoxalin-2-one
  • 6-methylquinoxaline-2,3-dithiocarbonate
  • Oxythioquinox
Molecular formula C 10 H 6 N 2 OS 2
Brief description

Solid

External identifiers / databases
CAS number 2439-01-2
EC number 219-455-3
ECHA InfoCard 100.017.687
PubChem 17109
Wikidata Q1074415
properties
Molar mass 234.30 g mol −1
Physical state

firmly

Melting point

170 ° C

solubility
  • practically insoluble in water (1 mg l −1 at 20 ° C)
  • soluble in cyclohexanone and DMF
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary
08 - Dangerous to health 07 - Warning 09 - Dangerous for the environment

Caution

H and P phrases H: 302-312-332-317-319-361f-373-410
P: 273-280-305 + 351 + 338-501
Toxicological data

1100 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 .

Quinomethionate is a chemical compound from the group of dithiocarbonates and a quinoxaline derivative .

Extraction and presentation

Quinomethionate can be produced by reaction of 2,3-dichloro-6-methylquinoxaline (CAS number: 39267-05-5) with sodium hydrogen sulfide and further reaction of the intermediate product 2,3-dithiol-6-methylquinoxaline (CAS number: 25625-62 -1) can be obtained with phosgene .

properties

Quinomethionate is a yellow, flammable solid that is practically insoluble in water.

use

Quinomethionate was developed in 1960 and is used as an acaricide , insecticide, and fungicide . It is used against powdery mildew and spider mites on fruit, ornamental plants, pumpkins, cotton, coffee, etc.

Admission

In EU countries such as Germany, Austria and Switzerland, no pesticides containing this active ingredient are approved.

Web links

  • Joint Meeting on Pesticide Residues (JMPR), Monograph for Quinomethionate

Individual evidence

  1. ↑ a b c d e f g Entry on 6-methyl-1,3-dithiolo (4,5-b) quinoxalin-2-one in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
  2. ↑ a b c Ullmann's Agrochemicals, Volume 1 . Wiley-VCH, 2007, ISBN 978-3-527-31604-5 ( page 598 in the Google book search).
  3. ↑ Entry on quinomethionates in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
  4. ↑ a b Thomas A. Unger: Pesticide synthesis handbook . 1996, ISBN 978-0-8155-1401-5 ( page 731 in the Google book search).
  5. ↑ General Directorate Health and Food Safety of the European Commission: Entry on quinomethionate (aka quinomethionate) in the EU pesticide database ; Entry in the national registers of plant protection products in Switzerland , Austria and Germany ; Retrieved March 3, 2016.