Permanid Soap is an anti scabies soap which is used as an acaricide, insecticide, and insect repellent. This soap belongs to the family of synthetic chemicals called pyrethroids. It functions as a neurotoxin, which directly affect neuron membranes by prolonging sodium channel activation. Permanid Soap is not known to harm most mammals or birds, but is highly toxic to cats. It has a low mammalian toxicity and is highly absorbed by skin.