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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

- Black liquor was not readily biodegradable.
- Biodegradation 48% (28 d) (OECD 301 E and EU Method C.4-B)
- Biodegradation 49.5% (28 d) (OECD 302 B)

Key value for chemical safety assessment

Biodegradation in water:
inherently biodegradable, fulfilling specific criteria

Additional information

Black liquor was not readily biodegradable according the ready biodegradation test (OECD 301, EU Method C.4 -B) and according to the literature information of an inherent biodegradation test (OECD 302B). Both studies suggested evidence for inherent, primary biodegradability (biodegradation over 20%).