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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

In a 3 h toxicity study, the activated sludge from a domestic waste water treatment plant were exposed to 3,3,5-Trimethylcyclohexanon at nominal concentrations of 10, 32, 100, 320, and 1000 mg/L under static conditions in accordance with the OECD guideline No. 209 (1984). The 3-h EC50 value based on the measured inhibition rates, were calculated to be 755 mg/L. At the highest nominal test concentration of 1000 mg/L, an inhibition rate of 64.1 % was found.

Key value for chemical safety assessment

EC50 for microorganisms:
755 mg/L

Additional information