Oxasulfuron

Structural formula
General
Surname	Oxasulfuron
other names	Oxetan-3-yl-2 - [(4,6-dimethylpyrimidin-2-yl) carbamoylamino] sulfonyl benzoate
Molecular formula	C 17 H 18 N 4 O 6 S
Brief description	beige powder
External identifiers / databases
CAS number 144651-06-9 EC number 604-430-5 ECHA InfoCard 100.131.014 PubChem 86443 ChemSpider 77958 Wikidata Q22808495
properties
Molar mass	406.41 g mol −1
Physical state	firmly
density	1.41 g cm −3
Melting point	158 ° C
solubility	sparingly soluble in water (1.7 g l −1 at 20 ° C and pH 7.8)
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary Caution H and P phrases H: 373-410 P: 260-273-314-391-501
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 .

Oxasulfuron is an active ingredient in crop protection and belongs to the sulfonylurea herbicide class . It's a beige solid.

history

Oxasulfuron was developed by Novartis Crop Protection (now Syngenta ) and introduced in 1996.

effect

Oxasulfuron is a selective herbicide . It is absorbed via the roots and nodes and transported on to the meristematic tissue. The active ingredient acts as an ALS inhibitor . Here, the biosynthesis of amino acids L leucine , L -isoleucine and L -valine , so some essential amino acids , inhibited . This inhibits cell division , so that growth comes to a standstill. Ultimately, the plants fade and necrosis forms , which is why the weeds die.

use

It is mainly used against broad-leaved weeds and grasses in soybean crops.

Environmental aspects

Oxasulfuron not bee toxic, but chronic aquatic environment . The degradation takes place hydrolytically and microbially with a half-life of approx. 14 days.

proof

Residues can be determined in plants and soils using the HPLC method . A UV detector is required for this.

Admission status

In Germany there are none so far pesticides admitted that this active ingredient contained. Oxasulfuron can be used in the EU .

Individual evidence

1. ↑ ^{a b} Oxasulfuron data sheet at Sigma-Aldrich , accessed on July 8, 2020 ( PDF ).
2. ↑ ^{a b c} Entry on Oxasulfuron in the GESTIS substance database of the IFA , accessed on July 8, 2020(JavaScript required) .
3. ↑ ^{a b c d e f g h i} Entry on Oxasulfuron. In: Römpp Online . Georg Thieme Verlag, accessed on July 8, 2020.
4. ↑ Entry on Oxasulfuron (ISO) in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on July 9, 2020. Manufacturers or distributors can expand the harmonized classification and labeling .
5. ↑ General Directorate Health and Food Safety of the European Commission: Entry on Oxasulfuron in the EU pesticide database ; accessed on July 10, 2020.