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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

With high probability acutely not harmful to aquatic algae.

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 Pseudokirchneriella subcapitata conducted according to OECD guideline 201 is available (NITE, 2009). In this study an ErC50 of > 110 mg/L (measured) after 72 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.