Chemical Name: (1R,3R)-3-(2,2-Dimethylvinyl)-2,2-dimethylcyclopropane carboxylic acid (1R)-cis,trans-tetramethrin ester
Common Name: D-Tetramethrin
Molecular Formula: C19H25NO4
Molecular Weight: 331.41 g/mol
CAS Number: 7696-12-0 (D-isomer)
Formulation Type: Technical Concentrate (TC)
Purity: ≥95% (by GC, D-isomer content)
D-Tetramethrin is a synthetic pyrethroid insecticide known for its rapid knockdown effect against flying and crawling insects. It is a stereoisomerically enriched form of tetramethrin, with the D-isomer showing significantly higher biological activity. D-Tetramethrin is widely used in aerosol sprays, mosquito coils, vaporizing mats, and other household and public health pest control products.
The product functions by disrupting the insect nervous system, leading to paralysis and death shortly after exposure. D-Tetramethrin is particularly effective at very low concentrations and is valued for its safety profile, rapid action, and minimal odor.
Appearance: Light yellow to amber viscous liquid or oily substance
Odor: Mild ester-like odor
Boiling Point: Decomposes before boiling
Flash Point: >100°C (closed cup)
Density (20°C): 1.05–1.10 g/cm³
Refractive Index (20°C): 1.490–1.510
Solubility: Insoluble in water; soluble in organic solvents such as kerosene, xylene, ethanol, and acetone
Stability: Stable under normal temperature and pressure; avoid heat, light, and oxidizing agents
Active Ingredient (D-Isomer): ≥95.0%
Total Tetramethrin Content: ≥98.0%
Moisture Content: ≤0.5%
Acidity (as HCl): ≤0.2%
Insolubles in Acetone: ≤0.5%
Color (APHA): ≤100
Appearance: Clear liquid without visible particles
D-Tetramethrin is widely used in:
Aerosol insecticide sprays for domestic and industrial use
Mosquito coils and electric vaporizer mats
Residual surface sprays
Space sprays for household and public health pest control
Target pests include:
Mosquitoes (Aedes, Anopheles, Culex spp.)
Flies (houseflies, fruit flies)
Cockroaches
Moths and other nuisance flying insects
Its fast knockdown action makes it an ideal active ingredient in formulations requiring rapid pest immobilization.
D-Tetramethrin acts on the insect’s central nervous system by modulating the gating kinetics of sodium channels. It prolongs the opening of sodium channels during nerve impulses, causing repetitive discharges, loss of motor coordination, paralysis, and death. It is particularly effective in vapor-phase action due to its high volatility.
Oral LD₅₀ (rats): >1000 mg/kg (low acute toxicity)
Dermal LD₅₀ (rats): >2000 mg/kg
Eye/Skin Irritation: Mild, not considered a strong irritant
Inhalation: Avoid breathing vapors; may cause mild respiratory irritation
Environmental Impact: Highly toxic to aquatic life; avoid contamination of water bodies
Packaging: 25 kg HDPE drums, 200 kg steel drums, or as required
Storage Conditions: Store in a cool, dry, well-ventilated area away from heat, light, and oxidizers. Keep container tightly sealed.
Shelf Life: 2 years under recommended storage conditions
Note: Refer to the product’s Safety Data Sheet (SDS) for detailed handling, storage, and disposal guidelines.
Let me know if you’d like a regulatory-focused version or one for label copy or marketing use.
