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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Link to relevant study record(s)

Description of key information

HDI Uretdion is not readily biodegradable. Within 28 days 1 % of the test substance was degraded (Closed Bottle Test), (Bayer AG, 2000).
In a 'Modified MITI (II) Test' with adapted inoculum 18 % degradation of HDI Uretdion could be obtained within 28 days (Currenta, 2009). Therefore the substance is considered to be "Not Inherently Biodegradable".
This result is used for assessing the behaviour of the substance in STPs.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information