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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Ready biodegradability: Not readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The ready biodegradability of a structural analogue, tetrahydromethylphthalic anhydride (MTHPA), was studied in a Modified MITI Test according to OECD test methods. The substance was exposed to activated sludge for 28 days. MTHPA changed to the dissociated substance, which was stable under the chosen conditions. As a result, the substance is considered to be not readily biodegradable.