Chemical Name: (R,S)-3-allyl-2-methyl-4-oxocyclopent-2-enyl (1R)-cis,trans-chrysanthemate
Common Name: D-Allethrin
Molecular Formula: C19H26O3
Molecular Weight: 302.41 g/mol
CAS Number: 231937-89-6 (D-allethrin, active isomer)
Formulation Type: Technical Concentrate (TC)
Purity: ≥95% (by Gas Chromatography)
D-Allethrin is a synthetic pyrethroid insecticide derived from natural pyrethrins. It is composed predominantly of the biologically active D-isomers of allethrin, resulting in enhanced insecticidal efficiency. D-Allethrin is widely used in household and public health applications due to its fast knockdown effect against a variety of flying and crawling insects, especially mosquitoes, houseflies, and cockroaches.
Its high vapor pressure and rapid action make it especially suitable for use in mosquito coils, mats, aerosols, and electric vaporizers. The compound has low mammalian toxicity, making it suitable for indoor pest control when used as directed.
Appearance: Clear to light yellow oily liquid
Odor: Mild characteristic ester odor
Boiling Point: Decomposes before boiling
Flash Point: >100°C (closed cup)
Density (20°C): 0.97–1.00 g/cm³
Refractive Index (20°C): 1.480–1.500
Solubility: Insoluble in water; soluble in organic solvents such as alcohols, acetone, xylene, and kerosene
Stability: Stable under normal storage conditions. Decomposes in strong acidic or alkaline media and under prolonged exposure to UV light
Purity (GC): ≥95.0%
Moisture Content: ≤0.5%
Acidity (as HCl): ≤0.2%
Isomer Ratio: High proportion of active D-isomers (typically ≥85% of total isomers)
Insoluble in Acetone: ≤0.5%
Color (APHA): ≤100
Appearance: Clear, free from suspended matter or sediment
D-Allethrin is effective against a wide range of insect pests including:
Flying insects: Mosquitoes, flies, moths, gnats
Crawling insects: Cockroaches, ants, silverfish
Uses include:
Mosquito coils and electric mats
Aerosol insecticide sprays
Liquid vaporizers
Indoor residual sprays
It provides rapid knockdown action and is ideal for enclosed residential or commercial environments.
D-Allethrin affects the nervous system of insects by modifying the function of voltage-gated sodium channels. It induces rapid neuronal firing, leading to paralysis and death. Its action is quick, and it begins working immediately upon exposure.
Oral LD₅₀ (rat): >1000 mg/kg (low acute toxicity)
Dermal LD₅₀ (rat): >2000 mg/kg
Skin and Eye Irritation: Mild; may cause irritation with prolonged exposure
Sensitization: Not a known skin sensitizer
Environmental Hazard: Toxic to aquatic organisms; avoid release into waterways
Packaging: 25 kg HDPE drum, 200 kg steel drum, or customized packaging
Storage: Store in a cool, dry, and well-ventilated place. Keep away from heat, sunlight, flames, and incompatible substances like strong oxidizers or acids
Shelf Life: 2 years in original, sealed containers under recommended storage conditions
Note: Always use personal protective equipment when handling the product. Refer to the Safety Data Sheet (SDS) for detailed handling, exposure, and disposal guidelines.
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