Overview
Fomesafen is a selective herbicide belonging to the diphenyl ether family, primarily used to control broadleaf weeds in legume crops such as soybeans and peanuts. It is a post-emergence herbicide, meaning it is applied after the weeds have sprouted. Fomesafen is valued for its effectiveness and selectivity, targeting weeds while minimizing damage to crops. Developed in the late 20th century, fomesafen has become a staple in agricultural weed management. Its chemical structure allows it to inhibit the enzyme protoporphyrinogen oxidase (PPO), disrupting chlorophyll production in weeds and leading to their death. This mechanism makes it highly effective against resistant weed species.
Physical and Chemical Properties
Fomesafen appears as a yellow to brown crystalline powder with a molecular weight of 401.68 g/mol. It has a melting point of 220-221°C, at which it decomposes. The compound is slightly soluble in water but dissolves well in organic solvents like acetone and methanol. Its chemical stability under normal storage conditions makes it suitable for long-term use. However, exposure to high temperatures or moisture can degrade its efficacy. The compound's selective action is due to its ability to penetrate weed foliage and disrupt metabolic processes without harming crops.
Main Applications
Fomesafen is predominantly used in agriculture for post-emergence weed control in soybean and peanut fields. It targets broadleaf weeds such as pigweed, morning glory, and velvetleaf, which compete with crops for nutrients and sunlight. In addition to legumes, fomesafen is sometimes used in other crops under specific conditions. Its effectiveness against herbicide-resistant weeds has made it a popular choice among farmers. However, proper application timing and dosage are critical to avoid crop injury and ensure optimal results.
Safety and Storage
Fomesafen is classified as a moderate toxic substance, requiring careful handling. Protective clothing, gloves, and goggles should be worn during application to prevent skin and eye contact. Inhalation of dust or vapors should be avoided. Storage conditions are crucial to maintaining the herbicide's efficacy. It should be kept in a cool, dry place, away from direct sunlight and moisture. Containers must be tightly sealed to prevent contamination. Spills should be contained and cleaned up immediately to prevent environmental contamination.
B2B Procurement Guide
When procuring fomesafen, B2B buyers should verify the CAS number (72178-02-0) and purity levels to ensure product quality. Reputable suppliers should provide certificates of analysis and compliance with regulatory standards. Price ranges vary depending on purity and supplier, typically between $20-$50 per kilogram. Bulk purchases may offer cost savings. Buyers should also consider logistics, ensuring proper transportation and storage conditions to maintain product integrity. Compliance with local and international regulations is essential for smooth import and use.
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