Malathion

Abstract

[Extract] The organophosphorous compound malathion (diethyl (dimethoxy thiophosphorylthio) succinate or S-[1,2-di(ethoxycarhonyl)ethyll O,O-dimethyl-phosphorothioate)is a yellow to deep-brown liquid with an odor of garlic which has a spectrum of activity such that it is a suitable acaricide and pediculicide. It is not volatile and is slightly soluble in water, alcohols, and aromatic solvents, but of limited solubility in petroleum oils. It remains biologically active for approximately two years if stored unopened in a cool, shaded, and well-aired environment at 68-86ºF. It is available in a variety of formulations such as emulsifiable concentrate, wettable powder, dustable powder and ultra-low-volume liquid formulations. It also is often formulated with many other insecticides.