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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 inhibition of the degradation activity of activated sludge is not anticipated when introduced in appropriate low concentrations.

Key value for chemical safety assessment

Additional information

Sodium 2 -methylpropan-2 -olate hydrolyses in water to form inorganic sodium hydroxide and tert-butanol. For the organic hydrolysis product a toxicity study with activated sludge of a predominantly industrial sewage conducted according to OECD guideline 209 is available (Burlington Research, 1992). In this study an EC50 of > 1000 mg/L (nominal) after 3 hours of exposure was determined. For sodium hydroxide no data are available since the substance completely dissociates in water and effects are related to a shift in pH values only.