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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

The substance is not readily biodegradable (according OECD criteria).

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The ready biodegradability of the test substance was tested in a guideline study conducted in compliance with EU Method C.4-E (Determination of the "Ready" Biodegradability - Closed Bottle Test). Based on Oxygen consumption, 1% biodegradation of 'Hexamethylene diisocyanate, oligomerisation product (biuret type)' was observed after 28 days by domestic activated sludge (Bayer AG, 2000).