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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The feasibility of biodegradation was investigated in a preliminary test and further examined by different ways of application.

The preliminary study was performed with a mixed inoculum of non-adapted soil and non-adapted activated sludge in the Manometric Respirometry Test for a period of 28 days.

There have been experiments to improve the bioavailability by the use of silica gel, silicon oil or soil. In part due to separation from the carrier material, in part due to the practical properties of the test item this was not successful. Therefore, it was concluded that no improvement of the bioavailability could be achieved.

Due to the low solubility and thus bioavailability of the test item under the conditions of the OECD 301 tests further studies for ready biodegradability are not feasible.

 

In a second study the registration substance has been investigated in an guideline comparable study (79/831/EWG (part C) ; DIN 38 409, part 52) to be not readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

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