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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Key value for chemical safety assessment

Additional information

The inhibiting effect of 4 -hydroxyacetophenone on oxygen consumption of activated sludge was investigated in an activated sludge respiration inhibition test according to OECD guideline 209 at following test concentrations: 62.5, 125, 250, 500 and 1000 mg/L (BASF SE, 2012). After an incubation time of 180 min the obtained effect concentrations resulted in EC20, EC50and EC80values of 130 mg/L, 380 mg/L and > 1000 mg/L, respectively.