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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

EC50 (3 h) = 225 mg/L (nominal)
EC10 (3 h) = 103 mg/L (nominal)
NOEC (3 h) = 100 mg/L (nominal) according to OECD 209

Key value for chemical safety assessment

EC50 for microorganisms:
225 mg/L
EC10 or NOEC for microorganisms:
103 mg/L

Additional information

The toxicity of 4 -tert butylcyclohexanol to aquatic microorganisms was investigated (2012-0116-DGO). This dose-response test with domestic activated sludge was carried out according to OECD guideline 209 under GLP conditions. The tested concentrations were 3.20, 10, 32, 100, 320 and 1000 mg/L. In addition a blank control (water) and positive control (reference item: Copper (II) sulphate pentahydrate p.a.) were tested. No effects occurred up to the test concentration 100 mg/L (NOEC, 3 h). The EC50 (3 h) was determined to be 225 mg/L (nominal); the EC10 (3 h) was 103 mg/L (nominal).