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Environmental fate & pathways

Biodegradation in water: screening tests

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4,4’-Difluorbenzophenon was tested in a manometric respirometry test according to the OECD Guideline for Testing of Chemicals, No. 301 F,for 28 days to determine whether the test substance is readily biodegradable. At the end of the test period a biodegradation rate of -4 % of the ThODNH4was measured for the test substance. Because the biodegradation rate was < 60 % of the ThODNH4after 28 days, the test substance 4,4’-Difluorbenzophenon cannot be considered to be readily biodegradable under the current test conditions.

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

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