r^toductà. W T&toce&àeà, Parathion Offered by American Cyanamid An ester of thiophosphoric acid with insecticidal properties, designated by the common name, "parathion/' is being produced b y the American Cyanamid Co., 30 Rockefeller Plaza, N e w York, under the name Thiophos 3422. The product, said to be more effective against a wider range of insects, mite'-, and other lower invertebrates t h a n a n y chemical now in practical use, w a s developed in Germany during t h e war. It is Ο,Ο-diethyl O-pnitrophenylthiophosphate and has the following structural formula: OQH5 S
