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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

0% Biodegradation in 28 days (OECD 301D)

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

One test on the biodegradability of 4,4´-(9H-fluoren-9-ylidene)bis(2-chloroaniline) (CAS No. 107934-68-9) is available. The study was conducted according to OECD 301D using filter paper as carrier (Douglas, 1991). There was no biodegradation observed within 28 days. A QSAR screening using BIOWIN v4.10 on 4,4´-(9H-fluoren-9-ylidene)bis(2-chloroaniline) indicated the substance even to be recalcitrant to ultimate biodegradation. Level III Fugacity modeling (not explicitely presented in this dossier) indicated soil and sediment as target compartments for environmental distribution (soil 53%, sediment 47%) for this substance with half-lives of 360 days for soil and 1620 days for sediment. Therefore, with regard to the PBT and vPvB criteria as presented in the Guidance on Information Requirements and Chemical Safety Assessment R.11 PBT-assessment (ECHA 2012), 4,4´-(9H-fluoren-9-ylidene)bis(2-chloroaniline) (CAS No. 107934-68-9) is regarded as very persistent (vP).