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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

Acute tests on all three trophic levels were performed to examine the aquatic toxicity of iso-butanol.

Daphnia turned out to be the most sensitive species revealing an EC50 (48h) of 1100 mg/L. Effects of iso-butanol towards fish, daphnia, and algae were found in the same range providing a LC50 (96h) of 1430 mg/L for fish and an EC50 (72h) of 1799 mg/L for algae, respectively.

Thus, iso-butanol is considered with high probability acutely not harmful to aquatic organisms. No adverse effects have been observed.

To determine the long-term toxicity, a study on the reproduction of Daphnia magna was performed. The calculated NOEC (21d) in this study was 20 mg/L [Kuehn & al., 1989]. No data on long-term toxicity on fish are available.