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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Weight of evidence approach:
Modified screening test-DOC die-away (1994): under test conditions no biodegradation observed
Modified screening test-DOC die-away (1997): under test conditions no biodegradation observed
Anaerobic degradation test (1994): under test conditions no biodegradation observed
Inherent degradation test- Zahn-Wellens (1994): not inherently biodegradable

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The results of all experimentally performed ready biodegradability tests which were considered to be valid confirm that the substance is not readily biodegradable. In an inherent degradation test (Zahn-Wellens Test), the substance was not inherently biodegradable and was also not degradable under anaerobic conditions within a period of 55 d.

No toxic effect ofthe substance on the microorganisms was investigated during the anaerobic test (100 mg test substance/L) and within the Modified screening tests - DOC die-away (1994, 1997) (20 mg test substance/L). Hence, it can be stated that the test item is non-toxic to microorganisms.