Document Type : Research Paper
Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Tehran Medical
Department of Chemistry, Karaj Branch, Islamic Azad University, Karaj, Iran
Agrochemical Industrial Research Center, Karaj, Iran
Chlorpyrifos is an organophosphate insecticide, used to control foliage and soil-borne insect
pests on a variety of food and feed crops. In the natural environment, Chlorpyrifos can be
degraded through several possible processes, including photodegradation, biodegradation, and hydrolysis. In the present work the photodegradation and environmental fate of Chlorpyrifos in aqueous phase under simulated natural conditions in the presence of artificial UV-light was investigated. The gas chromatography-mass spectrometry (GC-MS) identification of Chlorpyrifos
photodegradation products suggested the formation of only one major product, i.e., Chlorpyrifosoxon. Based on the structurally identified photoproduct a plausible degradation pathway is proposed for the photolysis of Chlorpyrifos in natural water over UV irradiated.