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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Description of key information

The inhibition of the degradation activity of activated sludge is not anticipated when introduced in appropriate low concentrations. IC20 (3h) > 100 mg/L (nominal) for activated sludge (OECD 209)

Key value for chemical safety assessment

Additional information

The influence on the respiration of microorganisms was investigated for one ‘yellow disazo condensation pigment’ (CAS 5580-57-4) in a guideline study according to OECD 209 (Solvias AG, 2000). The study was conducted with activated sludge from a municipal sewage treatment plant, which predominantly receives domestic sewage. Up to the highest test concentration of 100 mg/L (nominal) no inhibition on respiration observed after 3 hours of exposure.