Common name: prallethrin; pralléthrine; ETOC

IUPAC name: Roth: (S)-2-methyl-4-oxo-3-prop-2-ynylcyclopent-2-enyl (1R)-cis-trans-2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropanecarboxylate

Chemical Abstracts name: (S)-2-methyl-4-oxo-3-(2-propynyl)-2-cyclopenten-1-yl 2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylate

CAS RN: [23031-36-9]

 

Mol. wt.: 300.4; M.f.: C19H24O3; Form: Yellow to yellow-brown liquid. B.p.: 313.5 ºC/760 mmHg. V.p.: <0.013 mPa (23.1 ºC). KOW: logP = 4.49 (25 ºC). S.g./density: 1.03 (20 ºC). Solubility: In water 8 mg/l (25 ºC). In hexane, methanol, xylene >500 g/kg, 20-25 ºC. Stability: Under normal storage conditions, stable for at least 2 years. F.p.: 139 °C (Pensky-Martens closed test).

 

Mode of action: Insecticide with contact action.

Uses: Used to control public health insects (Blattodea, Culicidae, Muscidae).

Formulation types: AE; EC; EW; KN; Oil; Mat.

Compatibility: Incompatible with alkaline materials.

 

Oral: Acute oral LD50 for male rats 640, female rats 460 mg/kg.

Skin and eye: Acute percutaneous LD50 for rats >5000 mg/kg. Non-irritating to the eyes and skin (rabbits). Not a skin sensitiser (guinea pigs).

Inhalation: LC50 (4 h) for rats 288-333 mg/m3.

Toxicity class: WHO (a.i.) II; EPA (formulation) III

 

Birds: Acute oral LD50 for bobwhite quail 1171, mallard ducks >2000 mg/kg. Dietary LC50 for bobwhite quail and mallard ducks >5620 ppm.

Fish: LC50 (96 h) for rainbow trout 0.012, bluegill sunfish 0.022 mg/l.

Daphnia: EC50 (48 h) 0.0062 mg/l.