Malathion wani maganin kwari ne na organophosphate da ake amfani da shi wajen magance kwari iri-iri, da suka hada da sauro, kwari, da sauran kwari. Tsarin sinadaransa shine C10H19O6PS2, kuma yana aiki ta hanyar hana ayyukan enzyme acetylcholinesterase, wanda ke da mahimmanci ga aikin jijiya a cikin kwari. Ma'anar ƙamus na malathion ruwa ne marar launi, mara wari wanda ke da guba sosai ga kwari amma yana da lafiya ga mutane da sauran dabbobi masu shayarwa idan aka yi amfani da su yadda ya kamata.