Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Diuron is not readily biodegradable following the criteria given by the OECD Guidelines for the Testing of Chemicals. In water/sediment systems, Diuron is quickly eliminated from the water body, either by translocation into the sediment or via degradation (DT50values for the water phase of 4 to 9 days). However, degradation from the entire system is slower, with DT50values of 48 to 232 days. In Soil, Diuron degrades slowly with DT50values ranging from 118 days (humic sand) to 372 days (silt loam soil). The DT50value of the silt loam soil increased to 1920 days under sterile conditions indicating that degradation in soil is mainly microbial.