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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Depending on local conditions and existing concentrations, disturbances in the biodegradation process of activated sludge are possible (EC20 < 100 mg/l)

Key value for chemical safety assessment

Additional information

To determine the toxicity of Imidazole to STP microorganisms, a GLP study following OECD guideline 209 using domestic activated sludge was performed. The calculated EC50 (30 min) value in this study was >1000 mg/l, the EC20 (30min) 45 mg/l (BASF 2003).