Phenylpyrazoles

Fipronil

Products Fipronil is commercially available in many countries as a drop-on solution (spot-on) and as a spray for dogs and cats (e.g., Frontline, Eliminall). It is available as a veterinary drug and has been approved since 1995. Fipronil is also included in combination preparations together with the juvenile hormone analog S-methoprene, which inhibits the development … Fipronil

Pyriprole

Products Pyriprol is commercially available as a drop-on (spot-on) solution. It has been approved in many countries since 2007. Structure and properties Pyriprole (C18H10Cl2F5N5S, Mr = 494.3 g/mol) is a chlorinated and fluorinated phenylpyrazole derivative. It is structurally related to fipronil (Frontline) and is reported to be less toxic than the older compound. Effects Pyriprole … Pyriprole