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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 24 hour IC50 (inhibition of nitrification) is 84mg/L.

Key value for chemical safety assessment

EC50 for microorganisms:
84 mg/L

Additional information

The study by Blum and Speece (1991) does not follow standard guidelines with higher temperature and longer exposure than standard test conditions, and no positive controls. Most importantly, the tested concentrations, raw results and methods of data analysis are not reported. However, this study was used as the key study for this endpoint in the EU RAR for Toluene (2003) as it was the most conservative result reported. It is therefore considered suitable for use as a conservative key study here.