Organophosphate insecticides
Also appears on labels as: tetrachlorvinphos, tcvp
Tetrachlorvinphos (TCVP), an organophosphate: an insecticide that blocks the nerve enzyme cholinesterase.
Watched ingredients get highlighted on every product panel you open.
- Where it comes from
- Chemical synthesis.
- Why it's in the product
- The insecticide in some flea collars, powders and sprays.
- Safety and toxicity
- EPA moved to cancel TCVP pet collars in October 2022, over the risk to children who touch a pet wearing one. In September 2023 it dropped the cancellation after a revised assessment found no risks of concern, and its June 2024 interim decision requires the makers of TCVP pet products to report to it every year.
We make the longer argument about this one on the pesticide actives evidence page.
General reference, not veterinary advice. Dose, breed, and existing conditions change the answer, so talk to your vet before changing what your pet eats. Think we got this wrong? Tell us and we log it publicly.
Found in 1 scored product
Lowest scores first. Its presence here is not what drove those scores.