Identification of Thermal Degradation Products from Diuron and IprodioneDiuron and iprodione were pyrolyzed at 400-1000 °C in a helium atmosphere. They showed many similarities in their thermal behavior: both emitted carbon monoxide, hydrogen chloride, and hydrogen cyanide. The N-CO bonds were the first to be split and led to an isocyanate and an amine which degraded in turn into substituted ureas and gaseous products.With the objective of limiting the dangers resulting from chemical products, many industrial countries established regulations which have led to studies of the fate of these products. The behavior of some widely distributed pesticides when subjected to heat have already been described either for the thermal destruction of wastes and stocks (Me

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