Common name: Transfluthrin

Chemical name:

(1R-trans)-(2,3,5,6-tetrafluorophenyl)methyl-3-(2,2-dichloroethenyl)-2,3-dimethylcyclopropanecarboxylate

Structural formula:

Molecular formula: C₁₅H₁₂Cl₂F₄O₂

Chemical class: Pyrethroid insecticides

CAS No.: 118712-89-3

Properties:

Form: Pale yellow crystals

Melting point: 32℃

Vapour pressure: 4.0×10^-1 mPa (20℃)

Solubility in water: 5.7×10^-5g/l (20℃)

Solubility in solvents: In most organic solvents＞200g/l

Stability: No decomposition after 5h at 200℃,DT₅₀ in pure water(25℃)＞1y(pH 5), 14d(pH9)

Toxicity:

Acute oral LD₅₀ for rats: ＞5000mg/kg

Acute dermal LD₅₀ for rats: ＞5000mg/kg

Inhalation for rats LC₅₀: 0.513mg/l

Mild irritation to eyes and skin.

Ecotoxicology:

Effects on aquatic organisms: golden orfe 1.25μg/l, rainbow trout 0.7μg/l (96h), daphnia EC₅₀ 1.7μg /l(48h), algae EC₅₀ ＞0.1mg/l(72h).

Effects on bees: High toxic to bees

Effects on birds: Virginian tree quail and canary birds LD₅₀ ＞2000mg/kg

Environmental fate:

In aquatic ecosystem, tetrafluorobenzyl alcohol and tetrafluorobenzoic acid are formed.

Mode of action:

Effector on presynaptic voltage gate sodium channels in nerve membranes, causing knockdown effect in insects. Insecticide active by inhalation and contact; also repellent.

Usage:

Control of a wide range of pests, fast-acting against mosquitoes, flies, cockroaches and whitefly.