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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
NOEC (3h) >= 1000 mg/L (nominal) for activated sludge (OECD 209)

Key value for chemical safety assessment

Additional information

For two ‘red disazo condensation pigments’(CAS 68516-75-6 and CAS 71566-54-6) the influence on the respiration of microorganisms were investigated in GLP guideline studies according to OECD 209 [DR.U.NOACK-LABORATORIEN, 2012; Experimental Toxicology and Ecology, BASF SE, 2012]. Both studies conducted with activated sludge from municipal sewage treatment plants, which predominantly receives domestic sewage. Up to the highest test concentration of 1000 mg/L (nominal) no inhibition on respiration observed after 3 hours of exposure.