Ethoxysulfuron Chemical Properties

Melting point:

145-147°

Density 

1.426±0.06 g/cm3(Predicted)

storage temp. 

0-6°C

solubility 

Solubility in organic solvents (g/l at 20 °C)
Acetone 36.0
Ethyl acetate 14.1
Dichloromethane 107.0
n‐Hexane 0.006
Methanol 7.7
Polyethylene glycol 22.5
Toluene 2.5

pka

Dissociation constant (pKa at 20 °C) 5.28

form 

Solid

color 

White to Off-White

Water Solubility 

Solubility in water (g/l at 20 °C): 0.026 (pH 5) 1.353 (pH 7) 9.628 (pH 9)

CAS DataBase Reference

126801-58-9(CAS DataBase Reference)

Safety Information

Hazard Codes 

N

Risk Statements 

50/53

Safety Statements 

60-61

RIDADR 

UN 3077

Toxicity

LD50 in rats (mg/kg): >3270 orally; >4000 dermally (Hacker)

Ethoxysulfuron Usage And Synthesis

Uses

Herbicide.

Definition

ChEBI: Ethoxysulfuron is an aromatic ether.

Agricultural Uses

Ethoxysulfuron (HOE 095404) is a very flexible herbicide for the control of broadleaf and sedge weed species. Although rice is the main use crop, the compound can also be applied in cereals and sugarcane. Selectivity is achieved due to a differential metabolism in the target crops to that in the weeds. With an application rate of 15-60 g a.i. ha-1, a wide range of important annual and perennial rice weeds can be controlled, such as Cyperus spp., Aeschynomene spp., Eleocharis spp., Sagittaria spp., Scirpus spp., Amannia spp., Lindernia spp., Ludwigia spp., and Monochoria vaginalis. Ethoxysulfuron is fully selective in all types of seeded rice (dry drilled, pregerminated wet seeded, pregerminated water seeded) and all types of transplanted rice. The selectivity is not influenced by the rice GS at application time, nor by the water management or other environmental factors. Ethoxysulfuron was introduced in rice in 1996 (in Vietnam) and has been marketed by Bayer CropScience as a straight product under the trade name “Sunrice® WG” and as suspension concentrate (SC)-formulated products in combination with anilofos as “Riceguard®,” “Benefiter®,” “Sunrice Super,” and “Sunrice Plus”. In Australia ethoxysulfuron is used under the trade name “Hero®” for post-emergent control of Cyperus rotundus in sugarcane at a rate of 250 g a.i. ha−1.

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