Permethrin

Molecular Formula: C21H20Cl2O3
CAS Number: 52645-53-1
Appearance: A yellow to light orange-brown, low melting solid or viscous liquid.

Permethrin, sold under the brand name Nix among others, is a medication and insecticide. As a medication, it is used to treat scabies and lice. It is applied to the skin as a cream or lotion. As an insecticide, it can be sprayed on clothing or mosquito nets to kill the insects that touch them.