Hymexazole

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Structural formula
Structural formula of Hymexazole
General
Surname Hymexazole
other names
  • 5-methylisoxazol-3-ol
  • 3-hydroxy-5-methylisoxazole
Molecular formula C 4 H 5 NO 2
Brief description

colorless and odorless crystals

External identifiers / databases
CAS number 10004-44-1
EC number 233-000-6
ECHA InfoCard 100,029,988
PubChem 24781
Wikidata Q16512783
properties
Molar mass 99.09 g mol −1
Physical state

firmly

density

0.551 g cm −3

Melting point

86 ° C

boiling point

200-204 ° C

solubility

soluble in water (85 g l −1 at 25 ° C)

safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary
05 - Corrosive 07 - Warning

danger

H and P phrases H: 302-318-412
P: 273-280-305 + 351 + 338
Toxicological data

3900 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 .

Hymexazol is a chemical compound from the group of isoxazoles and one of Sankyo developed and early 1970s introduced fungicide .

Extraction and presentation

Hymexazole can be obtained by reacting diketene and hydroxylamine and then ring closure with hydrogen chloride .

use

Hymexazole is used as a systemic soil fungicide and dressing agent in rice, vegetable and sugar beet cultivation.

Admission

Plant protection products with hymexazole as an active ingredient (trade name Tachigaren ) are approved in Germany, Austria and Switzerland.

Individual evidence

  1. ↑ a b c d e Entry on Hymexazole. In: Römpp Online . Georg Thieme Verlag, accessed on December 17, 2014.
  2. ↑ a b c d Entry on 3-hydroxy-5-methylisoxazole in the GESTIS substance database of the IFA , accessed on February 9, 2017(JavaScript required) .
  3. ↑ Entry on 3-hydroxy-5-methylisoxazole in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on August 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
  4. ↑ a b Thomas A. Unger: Pesticide Synthesis Handbook . William Andrew, 1996, ISBN 0-8155-1853-6 , pp. 465 ( limited preview in Google Book search).
  5. ↑ General Directorate Health and Food Safety of the European Commission: Entry on Hymexazole in the EU pesticide database; Entry in the national registers of plant protection products in Switzerland , Austria and Germany ; accessed on February 14, 2016.