ABSTRACT
Release of endothall to the environment is expected to occur primarily during its use as a pre-emergence, post-emergence, turf and aquatic herbicide and harvest aid. Endothall should be highly mobile in soil; however, rapid degradation would limit the extent of leaching. If released to water, endothall should rapidly biodegrade under aerobic conditions and biodegrade more slowly under anaerobic conditions. Biotransformation is the major process for removal of endothall from water and soil. Endothall was primarily transformed into glutamic acid apparently by the tricarboxylic cycle and an alternate, unknown pathway. If released to the atmosphere, endothall is expected to exist predominantly on particles and should either settle out or wash out in precipitation. The most probable route of human exposure to endothall would be dermal contact by workers involved in the manufacture, handling or application of endothall. The general public could potentially be exposed through use on lawn weed control.
