Overview
Isoproturon is a phenylurea herbicide developed for selective weed control in agriculture. First introduced in the 1970s, it has been widely used in Europe and Asia for cereal crops. The compound works by inhibiting photosynthesis in target weeds, leading to their gradual elimination. As a systemic herbicide, isoproturon is absorbed by roots and leaves, then translocated throughout the plant. Its selective action allows it to protect crops like wheat and barley while effectively controlling competing weeds. Regulatory status varies by country, with some regions restricting use due to environmental concerns.
Physical and Chemical Properties
Isoproturon appears as a white crystalline solid with moderate water solubility (70 mg/L at 20°C) but good solubility in organic solvents like acetone and methanol. The compound is stable under normal temperatures but may decompose when heated to melting point (158-160°C). Chemically, isoproturon is characterized by its phenylurea structure with an isopropyl substitution. This configuration contributes to its herbicidal activity and selective properties. The substance shows low volatility, reducing risks of atmospheric dispersion during application.
Main Applications
The primary use of isoproturon is in pre- and post-emergence weed control for winter wheat, barley, and rye. It effectively manages annual grasses (e.g., blackgrass, wild oats) and broadleaf weeds without damaging the cereal crops when used as directed. In some regions, isoproturon finds application in non-crop areas like industrial sites and railways. Formulations typically include wettable powders or suspension concentrates, often combined with other herbicides for broader spectrum control. Application rates vary from 1-2 kg active ingredient per hectare depending on weed pressure and crop stage.
Safety and Storage
Isoproturon is classified as harmful if swallowed (Xn) and irritating to eyes and skin (Xi). 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. Storage requires dry, well-ventilated areas away from food and feed. Keep containers tightly closed to prevent moisture absorption. The compound is stable under recommended storage conditions but may degrade if exposed to extreme heat or direct sunlight over prolonged periods.
B2B Procurement Guide
When sourcing isoproturon, buyers should verify the CAS number (34123-59-6) and request certificates of analysis confirming purity (typically 95-98%). Technical grade material is most common for formulation, while analytical standards are available for testing purposes. Consider regional regulations as some countries have banned or restricted isoproturon due to groundwater contamination concerns. Reliable suppliers should provide SDS documentation and regulatory compliance statements. Bulk purchases (25kg bags or drums) generally offer better pricing, with prices fluctuating based on raw material costs and seasonal demand.
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