Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

There are reliable biodegradation studies available for DMDMH. There is also a reliable degradation study available for the hydrolysis product, DMH.   Due to the rapid hydrolysis of DMDMH to DMH studies conducted with the hydrolysis product, DMH, are considered relevant for environmental fate and ecotoxicology and are considered in this dossier.

 

A reliable study (Mead 2001) determined that DMDMH was degraded 78% within the 10-day window and the test substance can be considered readily biodegradable. Additional studies with the degradation product showed that DMH is also readily biodegradable in water. Consequently, the test substance and its hydrolysis product are considered readily biodegradable in water.

 

There are no reliable biodegradation in sediment/water studies for DMDMH. However, there is a reliable sediment/water degradation study available for the hydrolysis product, DMH.   Due to the rapid hydrolysis of DMDMH to DMH studies conducted with the hydrolysis product, DMH, are considered relevant for environmental fate and ecotoxicology and are considered in this dossier. The study by De Vette and Schoonmade (2002) provides a reliable (Klimisch 1) study that indicates DMH is biodegradable.