Overview
Clopyralid is a selective systemic herbicide belonging to the pyridine carboxylic acid group. It is widely used in agriculture to control broadleaf weeds, particularly in cereal crops, oilseed rape, and turf management. The herbicide is absorbed by the leaves and roots of weeds, translocating to growing points to inhibit growth. Developed in the 1970s, clopyralid has gained popularity due to its effectiveness against resistant weed species like thistles and clover. Its selective action ensures minimal impact on grasses, making it a preferred choice for integrated weed management systems.
Physical and Chemical Properties
Clopyralid appears as a white to light brown crystalline solid with a melting point of 151-153°C. It is moderately soluble in water (approximately 1 g/L at 20°C) and readily dissolves in organic solvents such as acetone and methanol. The compound is stable under normal storage conditions but may decompose under extreme heat or prolonged exposure to sunlight. Its molecular structure includes a pyridine ring with chlorine substitutions at the 3 and 6 positions, contributing to its herbicidal activity. The carboxylic acid group enhances its systemic mobility within plants, ensuring thorough weed control.
Main Applications
Clopyralid is primarily used in agriculture to control broadleaf weeds in crops such as wheat, barley, oats, and oilseed rape. It is also effective in turf management, particularly for golf courses and sports fields, where selective weed control is crucial. In addition to its agricultural uses, clopyralid is employed in non-crop areas like roadsides and industrial sites to manage invasive weeds. Its systemic action ensures long-lasting control, reducing the need for frequent reapplications. However, care must be taken to avoid drift to sensitive plants, as clopyralid can persist in soil and compost.
Safety and Storage
Clopyralid is classified as harmful if swallowed and can cause skin and eye irritation. Proper personal protective equipment (PPE), including gloves, goggles, and protective clothing, should be worn during handling. In case of contact, rinse immediately with plenty of water and seek medical advice if symptoms persist. The herbicide should be stored in a cool, dry place away from direct sunlight and moisture. Containers must be tightly sealed to prevent contamination and accidental spills. Disposal should comply with local regulations to minimize environmental impact.
B2B Procurement Guide
When procuring clopyralid, B2B buyers should verify the CAS number (1702-17-6) and purity specifications to ensure product quality. Suppliers should provide certificates of analysis (CoA) and relevant safety data sheets (SDS). Bulk orders typically offer cost advantages, but buyers should assess storage capacity and shelf life to avoid waste. It is advisable to source clopyralid from reputable manufacturers with a track record of compliance with international standards like ISO and GMP. Buyers should also consider logistics, including packaging and transportation requirements, to ensure safe and timely delivery.
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