CAS · 34256-82-1
Product Overview
Acetochlor丨CAS 34256-82-1 is a selective, pre-emergent herbicide widely used to control annual grasses and broadleaf weeds in row crops such as corn, soybeans, and sorghum. Acetochlor belongs to the chloroacetanilide chemical class and acts by inhibiting the synthesis of very long-chain fatty acids in germinating weed seedlings. This mode of action prevents cell division and elongation, effectively stopping weeds before they emerge.
Product Specifications
| Appearance | Brown or brownish yellow homogeneous liquid |
|---|---|
| Assay | 90% min |
| Primary Amide | 2.0% max |
| Water | 0.3% max |
| pH | 3.5 ~ 7.0 |
Applications
A. Pre-Emergence Herbicide
Acetochlor丨CAS 34256-82-1 is applied before or shortly after planting, but before weed emergence to control germinating weed seeds.
Main target crops:
Corn (maize) - primary use
Soybeans (in mixtures or specific formulations)
Sorghum, sugarcane, and cotton (in some regions)
Weeds controlled include:
Annual grasses (e.g., Setaria, Digitaria, Echinochloa)
Small-seeded broadleaf weeds (e.g., Amaranthus, Chenopodium)
B. Tank Mixes and Combinations
Often combined with other herbicides like atrazine, glyphosate, or mesotrione to broaden the weed control spectrum and prevent resistance.
Commercial premixes include names like Harness®, Degree®, and Surpass®.
Benefits
A. Excellent Residual Control
Provides up to 4–8 weeks of soil residual activity, controlling weed germination and early development.
Minimizes competition with crops during critical early growth stages.
B. Soil-Applied Selectivity
Selective to many monocot crops, particularly corn and sorghum.
Causes minimal phytotoxicity when applied at label rates with proper seed placement.
C. Effective Resistance Management Tool
Useful in rotation programs to delay resistance to ALS inhibitors, glyphosate, and PPO inhibitors.
Contributes to diverse herbicide programs in integrated weed management (IWM).
D. Enhances Crop Yield Potential
Early weed suppression reduces competition for light, nutrients, and moisture, allowing crops to maximize yield potential.
E. Versatile Formulations
Available as emulsifiable concentrates, capsule suspensions, and water-based solutions, suitable for various application systems.
Conclusion
Acetochlor丨CAS 34256-82-1 is a highly effective soil-applied herbicide for the early control of weeds in major row crops, particularly corn. Its long-lasting residual activity, compatibility with other herbicides, and contribution to resistance management make it an essential tool in modern crop production. However, like all herbicides, its success depends on responsible application, environmental stewardship, and integration with other weed control methods for sustainable agriculture.
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