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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Not readily biodegradable (according OECD criteria). 

Key value for chemical safety assessment

Additional information

The ready biodegradability of Hexamethylene diisocyanate, oligomers, blocked with dibutylamine was tested in a GLP guideline study in accordance with OECD 301B (Ready Biodegradability: CO2 Evolution Test). Based on the CO2 evolution < 10% biodegradation of the substance was observed after 28 days by domestic activated sludge from a municipal sewage treatment plant [BASF SE, 2012].