Factory Supply Pyroxasulfone Intermediate CAS 656825-92-2 as Pesticide

• Customization: Available
• Type: Agrochemical Intermediates
• Appearance: Powder
• Model NO.: 656825-92-2
• Quality: Industrial
• Colour: White
• Transport Package: as Required
• Specification: 99%
• Trademark: Worldyang
• Origin: China
• HS Code: 2922199090

Product Description

Pyroxasulfone Intermediate

CAS: 656825-92-2
Certification: ISO9001:2015

This product serves as an intermediate for pyroxasulfone. Below is an overview of pyroxasulfone's usage and key features:

Introduction

Pyroxasulfone, also known as KIH-485 or KUH-043, is a novel pre-emergent herbicide jointly developed by Kumiai Chemical Industry Co., Ltd., Ihara Chemical Industry Co., Ltd., Bayer, and BASF. Marketed under trade names such as Anthem, Fierce, Sakura, Sekura, and Zidua, it effectively controls grass and broadleaf weeds in cornfields, soybean fields, and wheat fields.

Properties

• Appearance: White crystalline powder
• Melting Point: 130.7°C
• Solubility:
  • Water: 3.49 mg/L (20°C)
  • Acetone: ≥250 g/L
  • Dichloromethane: 151 g/L
  • Ethyl acetate: 97 g/L
  • Methanol: 11.4 g/L
  • Toluene: 11.3 g/L
  • Hexane: 0.072 g/L
• Vapor Pressure: 2 × 10^-6 Pa (25°C)
• Stability: Stable for 14 days at 54°C

Mode of Action

Pyroxasulfone is absorbed through weed roots and shoots, inhibiting early growth by disrupting apical meristem and coleoptile growth. It specifically targets the biosynthesis of very-long-chain fatty acids (VLCFAs), essential for plant cell membranes and cuticular waxes. The herbicide inhibits the elongation of VLCFAs such as C18:0 to C28:0, thereby preventing proper membrane formation and leading to weed death.

Applications

1. Target Crops:
   Corn, soybeans, wheat, peanuts, cotton, sunflowers, and potatoes.
2. Weed Control Spectrum:
   Broad-spectrum control of annual grasses (e.g., Setaria, Digitaria, Echinochloa) and broadleaf weeds (e.g., Amaranthus, Chenopodium).
3. Advantages:
   • Effective against weeds resistant to other herbicides, such as pigweed, ragweed, and foxtail.
   • Long-lasting effect, up to 85 days, with low application rates (125-250 g/ha).
   • Safer to crops like corn and soybeans, even without the use of safeners.

Toxicity

• Acute Toxicity:
  • Oral LD50 (rats): ≥2000 mg/kg
  • Dermal LD50 (rats): >2000 mg/kg
  • Inhalation LC50 (rats): >5800 mg/m³
• Ecotoxicity:
  • Fish (Rainbow trout LC50): 2.2 mg/L
  • Aquatic invertebrates (Daphnia magna LC50): 4.4 mg/L
  • Bees (contact LC50): >100 µg/bee

Summary of Benefits

Pyroxasulfone is highly effective at controlling a wide range of weeds with a low application rate and extended duration of action. It demonstrates excellent crop safety and shows great promise for pre-emergent use in corn and soybean fields, potentially replacing older herbicides like acetochlor and metolachlor.