Ethoxy ethyl

CAS Number: 126801-58-9

English name: Ethoxysulfuron

Chemical Name: 1 - (4,6 - dimethoxy pyrimidine -2-- yl) -3-- (2 - ethoxy phenoxy sulfonyl) urea; 1 - (4,6-dimethoxypyrimidin-2-yl) -3 - (2-ethoxyphenoxysulfonyl) urea;

Other names: Sun Star, ethoxy ethyl

Molecular formula: C15H18N4O7S

MW: 398.39

Properties: white powder solid. Specific gravity of 1.48g/cm ^ (3) (20 ℃), melting point 141-147 ℃, vapor pressure of 6.6 × 10 ^ (-5) pa (20 ℃), Solubility (g / L): 0.006 n-hexane, toluene 2.5 , Acetone 36, dichloromethane 107, 7.7 methanol, isopropyl alcohol 1.0 ethyl acetate 14.1, 22.5 polyethylene glycol, dimethyl sulfoxide> 500, water 26.4mg / L (pH = 5), 1353 mg / L (pH7), 7628 mg / L (pH9). Half-life: DT50 65 (pH 5), 259 (pH 7), 331 (pH 9) days.

Toxicity: low toxicity of this product. More than 3270 rat acute oral, acute percutaneous 4000. The goods on rabbit eyes and skin puncture emblem, no mutagenicity.

Role of the characteristics and uses: This product is a sulfonylurea herbicide. Mainly used for Control in broadleaf weeds and sedge weeds. Wheat, rice, sugar cane and other security, and no effect on the succeeding crop. Dose due to crops, regions, seasons vary for the 10 ~ 120g (ai) / ha. Rice fields in China to use a dose of 6.75 ~ 31.5g (ai) / ha, South paddy with low volume, high-volume use of paddy field. Mixed with other herbicides used in wheat fields can be expanded spectrum herbicide.

Formulation: 15% water dispersible granule,

Production methods: the synthesis of ethoxy ethyl many ways, the best way is: chloride sulfone (sulfonyl chloride) as the starting material prepared by the reaction with sodium cyanate chlorosulfonyl isocyanate and then reacted with o-Hydroxy ether reaction, and finally with the dimethoxy pyrimidine amine in toluene, 100t 2h have objects which condensation reaction, the yield of 96.4%, 98.8% purity.

 

 

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