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Crop Protection Database

Oxasulfuron

Action/Use:
  • Herbicide
Use: For use on soybeans.
Chemistry
Class: Sulfonylurea.
Formula: SO2NHCONH.
Properties: White, odorless powder. Solubility at 25°C: in acetone 670 g/kg, ethanol 330 g/kg, methanol 1440 g/kg, toluene 10 g/kg.
Oxasulfuron
Mode of Action / Resistance Management
Chemical Group: Sulfyonylurea
Mode of Action: Inhibition of acetolactate synthase ALS (acetohydroxyacid synthase AHAS)
Action Group: HRAC Group B; WSSA Group 2
Registration
U.S.A.: Not registered.
Outside U.S.A.: Brazil.
Environmental Guidelines
Hazards: Fish: LC50 >111 mg/l (bluegill sunfish); >116 mg/l (trout). Bird: Oral LD50 >2250 mg/kg (mallard duck, quail). Bee: Nontoxic. LD50 >25 µg/bee
Water Solubility: 280 g/l at 25°C
Safety Guidelines
Signal Word: CAUTION
Toxicity Class: III
Toxicity: (Rat): Oral LD50 >5000 mg/kg. (Rabbit): Dermal LD50 >2000 mg/kg
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