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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Biodegradation screening tests indicate little or no biodegradation of the components of this substance.  

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The components of DVB-55, -65, and -HP have exhibited little or no biodegradation in screening tests of ready biodegradability. However, this does not necessarily indicate the substances to be persistent in the environment. The testing of biodegradation potential of the DVB substances is confounded by their volatility and potential for toxicity/inhibition of the microbial inocula using the relatively high concentrations used in these tests. Similar substances, such as ethylbenzene, xylenes, styrene, etc. have been shown to be biodegradable in water and soil; and the pathways for their aerobic biodegradation have been elucidated. Therefore, these substances are expected to be ultimately biodegradable in the environment, and a simulation test in surface water/sediment is proposed to investigate this potential.