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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Link to relevant study record(s)

Description of key information

Based on the results of several studies there is evidence that 1,3-dichloro-4-nitrobenzene is not readily biodegradable (Bayer, 1981; Hoechst, 1983, MITI, 1995).

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

All available studies have several drawbacks as either the documentation is insufficient for assessment or industrial sludge was used for the test. In none of the studies biodegradation was observed, even using industrial sludge. Therefore, the studies can be part of a Weight-of-Evidence approach supporting the evidence that 1,3 -dichloro-4 -nitrobenzene is not readily biodegradable as this is the most stringent classification with respect to environmental hazards.