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Environmental fate & pathways

Biodegradation in soil

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Description of key information

Based on the available studies on biodegradation are the branched triamines considered to be readily biodegradable, which means that there is no direct requirement to perform a biodegradation in soil test. No simulation tests for degradation rates under environmental conditions are available, therefore for the default values suggested by the REACH guidance are used.  For soil this is a half life value of 30000 days based on the Kd of 50000 L/kg which was observed for a linear tetramine C16-18 until better soil data become available.

Key value for chemical safety assessment

Half-life in soil:
30 000 d

Additional information

Based on the available studies on biodegradation are the branched triamines considered to be readily biodegradable. The 10 -days-window criterion should not be evaluated in case mixtures are tested. There is therefore no direct requirement to perform a biodegradation in soil test.

No simulation tests for degradation rates under environmental conditions are available, therefore for the default values suggested by the REACH guidance re used. For soil this is a half life value of 30000 days based on the Kd of 50000 L/kg which was observed for a linear tetramine C16-18 until better soil data become available.

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