Prallethrin
Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methyl-1-propenyl)-, 2-methyl-4-oxo-3-(2-propynyl)-2-cyclopenten-1-yl ester
EPA Substance Registry Services (SRS) listed active ingredient for pesticide products.
Safety around dogs & cats
Cats are the sensitive species for prallethrin, as for all pyrethroids, because of their glucuronidation deficiency (ASPCA, Pet Poison Helpline, VCA), so keep cats away from coils, vaporizers, and cartridges and never let one mouth the source. Dogs are far more tolerant (Merck Veterinary Manual). Keep pet birds out of enclosed treated spaces, and never apply to any animal.
Moderate confidence. Ratings from ASPCA Animal Poison Control, the Pet Poison Helpline, and published veterinary toxicology. This is general information, not veterinary advice. If your pet is exposed, call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435.
The evidence
Prallethrin is an established mosquito-control insecticide, but as a spatial-repellent vapor it tests measurably weaker than transfluthrin or metofluthrin, and there is little peer-reviewed field evidence of a consumer prallethrin emanator reducing bites by a specific amount, so treat its spatial claims as less well substantiated.
- Vapor toxicity of five volatile pyrethroids against Aedes aegypti, Aedes albopictus, Culex quinquefasciatus, and Anopheles quadrimaculatus2018LabLimited evidence
Laboratory vapor-toxicity ranking of five volatile pyrethroids against four mosquito species.
Regulatory notes
Source: EPA SRS active ingredient list export. Minimum risk (25(b)) status is applied separately when applicable.