Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Biodegradation in water: screening tests

In a modified Sturm test DPGDB was found to have degraded by 6% after 2 days, 62% after 12 days, and by 85% at the end of the 28 -day biotic phase of the test. The positive control substance, sodium benzoate, which was analysed contemporaneously degraded rapidly (63% degradation after 6 days), and confirmed that the inoculum was viable and that the test was valid.

Substances are considered to be readily degradable in this test if CO2 production is equal to or greater than 60% of the theoretical value within ten days of the level achieving 10%. In the Modified Sturm test, DPGDB met these criteria, so may be considered to be readily biodegradable. The BOD / COD studies show DPGDB to be inherently biodegradable and the anaerobic study showed it to be anaerobically biodegradable.

Biodegradation in water and sediment: simulation tests

In accordance with the adaptations found in column 2 of Annex IX, simulation studies of biodegradation in water and sediments are waived due to the demonstrated ready biodegradation of the substance.

 

Biodegradation in soil

In accordance with the adaptations found in column 2 of Annex IX, simulation studies of biodegradation in soils are waived due to the demonstrated ready biodegradation of the substance. 

 

Mode of degradation in actual use

No data available.