has part has role proinsecticide (R)-malathion (S)-malathion organothiophosphate insecticide agrochemical antiparasitic agent EC 3.1.1.8 (cholinesterase) inhibitor EC 3.1.1.7 (acetylcholinesterase) inhibitor pediculicide racemate malathion A racemate comprising equimolar amounts of (<i>R</i>) and (<i>S</i>)-malathion. It is a broad spectrum organophosphate proinsecticide used to control a wide range of pests including <em>Coleoptera</em>, <em>Diptera</em>, fruit flies, mosquitos and spider mites. CHEBI:6651 scabicide