Overview
Tribenuron-methyl is a sulfonylurea herbicide developed for the selective control of broadleaf weeds in cereal crops. It belongs to the chemical class of sulfonylureas, known for their high herbicidal activity at low application rates. The compound inhibits the enzyme acetolactate synthase (ALS), which is essential for plant growth, leading to weed death while leaving cereal crops unaffected. Introduced in the 1980s, tribenuron-methyl has become a staple in integrated weed management programs due to its effectiveness against resistant weed species. It is commonly formulated as a wettable powder or water-dispersible granules for easy application in agricultural settings.
Physical and Chemical Properties
Tribenuron-methyl is a white to off-white crystalline powder with a melting point range of 141-144°C. It is slightly soluble in water (1.4 g/L at 20°C) but more soluble in organic solvents such as acetone and methanol. The compound is stable under normal storage conditions but may degrade when exposed to strong acids or bases. The molecular structure of tribenuron-methyl includes a sulfonylurea bridge, which is responsible for its herbicidal activity. Its low volatility and moderate persistence in soil make it suitable for pre- and post-emergence weed control. The herbicide is absorbed by plant foliage and roots, translocating to growing points to inhibit weed growth.
Main Applications
Tribenuron-methyl is primarily used to control broadleaf weeds in wheat, barley, and other cereal crops. It targets weeds such as chickweed, mustard, and pigweed, which compete with crops for nutrients and sunlight. The herbicide is applied at rates ranging from 10-30 g per hectare, depending on weed species and growth stage. In addition to cereal crops, tribenuron-methyl is sometimes used in non-crop areas like roadsides and industrial sites. Its selective action ensures minimal damage to grass species, making it a preferred choice for integrated weed management systems. Always follow label instructions to avoid crop injury and ensure effective weed control.
Safety and Storage
Tribenuron-methyl has low acute toxicity to mammals, but prolonged exposure should be avoided. Use gloves, goggles, and protective clothing when handling the chemical. In case of skin contact, wash immediately with soap and water. Store the herbicide in its original container, away from food, feed, and beverages. Proper storage conditions include a cool, dry place with temperatures below 30°C. Keep the container tightly sealed to prevent moisture absorption and degradation. Dispose of unused product or empty containers according to local regulations to minimize environmental impact.
B2B Procurement Guide
When procuring tribenuron-methyl, verify the CAS number (101200-48-0) to ensure product authenticity. Request a certificate of analysis (CoA) to confirm purity, which is typically 95% or higher for agricultural-grade products. Compare prices from multiple suppliers, as bulk purchases may qualify for discounts. Check for compliance with regional agricultural regulations, as some countries have restrictions on sulfonylurea herbicides. Reliable suppliers should provide safety data sheets (SDS) and technical support for proper usage. Consider logistics, including packaging options (e.g., 25 kg bags or custom quantities) and shipping conditions to maintain product integrity.
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