Diclomezin

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Structural formula
Structural formula of diclomezine
General
Surname Diclomezin
other names
  • 6- (3,5-dichloro-4-methylphenyl) -3 (2 H ) -pyridazinone
  • Monguard
Molecular formula C 11 H 8 Cl 2 N 2 O
Brief description

colorless crystals

External identifiers / databases
CAS number 62865-36-5
EC number 613-092-8
ECHA InfoCard 100.122.035
PubChem 93341
Wikidata Q19278175
properties
Molar mass 255.10 g mol −1
Physical state

firmly

Melting point

250.5-253.5 ° C

solubility

practically insoluble in water (0.74 mg l −1 at 20 ° C)

safety instructions
GHS labeling of hazardous substances
06 - Toxic or very toxic

danger

H and P phrases H: 331
P: 261-311
Toxicological data

12,000 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 .

Diclomezin is a chemical compound from the pyridazinone group and a fungicide introduced by Sankyo in 1988 .

Extraction and presentation

Diclomezin can be obtained from toluene and succinic anhydride . Their product is chlorinated using aluminum chloride. In the next step, the pyridazine ring is formed through reaction with hydrazine hydrate . Reaction with bromine leads to the end product.

use

Diclomezin is a fungicide with a curative and protective effect, which inhibits septum formation and mycelial growth .

It is used against fungal diseases in rice such as Rhizoctonia , Corticium , Sclerotium , Typhula .

Admission

Diclomezin is not approved as a crop protection agent in the European Union or Switzerland .

Individual evidence

  1. ↑ a b c d e f Entry on diclomezin. In: Römpp Online . Georg Thieme Verlag, accessed on January 10, 2015.
  2. ↑ a b Data sheet Diclomezine, PESTANAL at Sigma-Aldrich , accessed on May 19, 2017 ( PDF ).
  3. ↑ a b c unknown: Diclomezine . In: Journal of Pesticide Science . tape 13 , no. 4 , 1988, pp. 625–628 , doi : 10.1584 / jpestics.13.625 (Japanese, PDF (Japanese)).
  4. ↑ Thomas A. Unger: Pesticide Synthesis Handbook . William Andrew, 1996, ISBN 0-8155-1853-6 , pp. 520 ( limited preview in Google Book Search).
  5. ^ Directorate-General for Health and Food Safety of the European Commission: EU pesticide database ; Entry in the national directory of plant protection products in Switzerland ; Retrieved June 25, 2016.