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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The test material is not readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

In a key study performed in accordance with OECD 301B CO2 Evolution Test. The inoculated mineral medium was dosed with a known amount of test substance (measured as 10 mg carbon/L) as the nominal sole source of organic carbon and aerated with CO2-free air. The CO2 produced from the mineralization of organic carbon within the test chambers is displaced by the flow of CO2 -:free air and trapped as K2CO3 in KOH trapping solution. The amount of CO2 produced by the test substance (corrected for that evolved by the blank inoculum) is expressed as a percentage of the theoretical amount of CO2 (TCO2) that could have been produced if complete biodegradation of the test substance occurred over the 28-day study period.

The average percent biodegradation for the test material was 17.4%.

The test material cannot be considered to be readily biodegradable under the strict terms and conditions of OECD Guideline No 301B.