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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Hydrocarbons, C14-C20, aliphatics (≤2% aromatics) were found to be readily biodegradable (biodegradation > 60% ThOD) in an OECD 306 ready biodegradability test. Taking into account that all those substances have been found biodegradable in seawater 306 test, this is taking over all screening tests results and lead to the conclusion that all the substances belonging to this category with the same properties and are therefore considered readily biodegradable.

Hydrocarbons, C12-C16, isoalkanes, cyclics, <2% aromatics biodegraded to an extent of 18% after 28 days and 25% after 28 days in a test of ready biodegradability. These results suggest that Hydrocarbons, C12-C16, isoalkanes, cyclics, <2% aromaticscan be characterized as inherently biodegradable.

Hydrocarbons, C14-C18, n-alkanes, isoalkanes, cyclics, ≤2% aromatics was biodegraded 74% at day 28 in a Closed Bottle test. Hence this substance should be classified as readily biodegradable.

 

Hydrocarbons, C14-C16, n-alkanes, <2% aromatics was found to be readily biodegradable under the conditions of an OECD 301 study meeting the 10-d window.

 

The biodegradation prediction by BIOWIN does not lead to the conclusion that Icosane would be persistent.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

Hydrocarbons, C14-C20, aliphatics (≤2% aromatics) were found to be readily biodegradable (biodegradation > 60% ThOD) in an OECD 306 ready biodegradability test. Taking into account that all those substances have been found biodegradable in seawater 306 test, this is taking over all screening tests results and lead to the conclusion that all the substances belonging to this category with the same properties and are therefore considered readily biodegradable.