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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

2,4,4-trimethylpentene is not readily biodegradable with a reported 1.6% biodegradation within 28 days.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The key and supporting studies by Hydrotox (2004) and Wildlife International (2006) are GLP compliant and follow standard guidelines. They both support the characterisation of 2,4,4 -trimethylpentene as not readily biodegradable. In the EU RAR (2008), it is concluded that, based on the available information a sound assessment of biodegradation is not possible, so as a worst-case 2,4,4-trimethylpentene has to be assessed as not biodegradable. The data are supported by the results from the QSAR estimations using the BIOWINand BioHC models.