Overview
Trans-Phenothrin is a type-I pyrethroid insecticide derived from chrysanthemum acid. It is the trans-isomer of phenothrin, exhibiting higher bioactivity than its cis counterpart. Developed as a synthetic alternative to natural pyrethrins, it combines efficacy with enhanced stability. As a contact and stomach poison, it targets the nervous systems of insects, causing paralysis and death. Its low mammalian toxicity and rapid biodegradability make it suitable for residential and agricultural use. Regulatory approvals vary by region, requiring compliance checks for B2B applications.
Physical and Chemical Properties
Trans-Phenothrin is a viscous liquid with negligible water solubility but high solubility in organic solvents. Its density of 1.06 g/cm³ and stability under normal conditions facilitate formulation into sprays, coils, and emulsifiable concentrates. The compound decomposes at temperatures above 200°C, releasing carbon monoxide and other hazardous gases. Its photostability allows outdoor use, though degradation accelerates under UV exposure. Technical-grade products typically contain 90-95% trans-isomer, with impurities affecting efficacy and shelf life.
Main Applications
Trans-Phenothrin is a key ingredient in household insecticides, particularly mosquito coils and electric vaporizer mats. Its knockdown effect on flying insects like mosquitoes and flies is widely utilized in public health programs. In agriculture, it controls pests on crops such as cotton and vegetables, often blended with synergists like piperonyl butoxide. Industrial applications include pest control in stored grains and textiles. Formulations range from 0.1-1% for aerosols to 10-20% for concentrated solutions.
Safety and Storage
While Trans-Phenothrin has low acute toxicity to humans (LD50 >5,000 mg/kg for rats), prolonged exposure may cause skin irritation or respiratory discomfort. PPE such as gloves and masks is recommended during handling. Store in original containers away from heat and open flames. Spills should be contained with inert absorbents and disposed of per local regulations. The compound is highly toxic to bees and aquatic organisms, necessitating precautions to prevent environmental contamination.
B2B Procurement Guide
B2B buyers should prioritize suppliers with ISO or GMP certifications to ensure product consistency. Request certificates of analysis (CoA) detailing purity, isomer ratio, and impurity profiles. Bulk purchases (100+ kg) often qualify for discounts, but verify logistics options for hazardous chemicals. Regional regulations (e.g., EU BPR, US EPA) may restrict concentrations or require labeling adjustments. Consider pre-formulated solutions to reduce handling risks and streamline production.
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