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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The substance was tested in an anaerobic test design and in an inherently biodegradability study design, and in both tests the substance showed no biodegradation. Therefore, the substance is considered not biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed
Type of water:
freshwater

Additional information

There was early on evidence that Tert-butyl-4-methoxy-4'-dibenzoylmethane (BMDBM) would not be readily biodegradable under aerobic conditions. Therefore, an anaerobic biodegradation study was conducted, using digested sludge from a municipal wastewater treatment facility. The test result was also negative. The following study on inherent biodegradability revealed that the test item is not biodegradable.

Based on the ECHA guidance documents on biodegradability, if a study on inherent biodegradability reveals negative results, the substance shall be regarded as not biodegradable, and further testing shall not be considered. Therefore, simulation studies in soil were being waived.