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Environmental fate & pathways

Biodegradation in soil

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Key value for chemical safety assessment

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In a study according to OECD 307 the amount of the parent compound in soil decreased down to a value of 14 % of the initial amount in 30 days. An appendant half-life for the parent compound in soil of 4.9 days was determined (IES 2010).

The data are not sufficient since it can not be concluded if mineralisation of the test substance has occured. Therefore, no suitable data on biodegradation in soil is available.

Further biotic degradation testing shall be proposed if the chemical safety assessment according to Annex I indicates the need to investigate further degradation of the substance and its degradation products. The test substance was found to be non-biodegradable in an OECD 301F study (RCC 1999). This result is supported by another biodegradation study. Hence, it can be expected that the test substance is not biodegradable in soil biodegradation tests either. Therefore, further studies on the biodegradation in soil are not provided.