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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The test item was tested for ready biodegradability in the CO2 evolution test according to OECD 301 B (1992). Based on the rate of biodegradation of <10 % CO2/ThCO2 at the end of exposure the test substance is considered to be not readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The ready biodegradability of the test item was tested in the CO2 Evolution Test with non-adapted inoculum (activated sludge from a municipal sewage plant) over a period of 28 days according to OECD Guideline for Testing of Chemicals 301 B (1992) and to the Commission Regulation 2008/440/EC, C.4-C. The test item concentration was 20 mg/L TOC, equivalent to approximately 27 mg/L test substance.

The required pass level for ready biodegradability within a ten days window was not reached and the degree of biodegradation after an exposure period of 28 days was <10% CO2/ThCO2. Therefore the test substance is considered as not readily biodegradable under the conditions of this test.