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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Long-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

Description of key information

The measured 11d-NOEC of the structurally related substance TMAC to Daphnia magna was 30 µg/L. Based on molecular weight (91 g/mol for TMAOH and 110 g/mol for TMAC), this corresponds with 25 µg/L TMAOH.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
25 µg/L

Additional information

Justification for use of the study performed with TMAC for determination of the long-term toxicity of TMAOH to Daphnia magna is given in the attached Read Across document.

The long-term toxicity of the structurally related substance TMAC with Daphnia magna was carried out in accordance with EPA/600/4-85/014 and GLP under semi-static conditions (Dow Chemical Co. (1991). Nominal concentrations were confirmed by analytical measurements. The measured 11d-NOEC of TMAC to Daphnia magna was 30 µg/L. Based on molecular weight (91 g/mol for TMAOH and 110 g/mol for TMAC), this corresponds with 25 µg/L TMAOH