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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The substance is poorly biodegradable according to OECD criteria.

Key value for chemical safety assessment

Additional information

Three studies on ready biodegradability, two studies on inherent biodegradability and a BOD5-study are available for the biodegradation assessment of the test item. The results of all three ready biodegradability studies demonstrate that the test substance is not readily biodegradable (< 10% degradation in an OECD 301B study (BASF SE 22G0436/11G095), 22% degradation in an OECD 301E study (BASF 1900397, 1990) and 33% in a study according to ISO7827 (LGU 1990)).

Additional information is given from two OECD 302B tests. After 28 days a biodegradation of 63 % and 67% was determined, respectively (BASF 1900397 and LGU 1990).

Finally, there was only marginal oxygen consumption in a BOD5-test which substantiates the results of the ready tests (BASF 01501, 1987).

Based on these data, the test substance is considered to be poorly biodegradable and moderately eliminable from water.