Today it is regulated by the EPA. Malathion is used outdoors to kill various insects and registered for use on food, feed, and ornamental crops. It is colorless to light amber and often has a skunk like odor. Malathion is also often used in shampoos regulated by the FDA for the eradication of head lice. It is a toxic chemical agent whether contact is made via the skin, ingestion, or inhalation. This chemical is considered an organophosphate insecticide which binds to the enzyme acetylcholinesterase, AChE, at the nerve endings in the bodies of insects and other organisms.
Acute toxicity levels have been studied in rats, mice, and human subjects. Whether ingested orally, absorbed through the