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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Expected as not readily biodegradable.

Key value for chemical safety assessment

Additional information

The substance is a diphenyl-pyrazolines derivative brightener. The substance is not expected to be ready biodegradable because of its chemical structure and its specific function. Commonly, optical brighteners undergo a primary transformation, i.e. discolourization due to the interrupting the conjugation. Nevertheless, the degradation process involves more steps and take more time.

The QSAR based screening criterion for identifying substances for persistency (P and vP) confirmed that the substance is expected to be not readily biodegradable.