Registration Dossier
Registration Dossier
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EC number: 212-740-3 | CAS number: 865-47-4
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
With high probability acutely not harmful to aquatic algae.
Key value for chemical safety assessment
Additional information
Potassium tert-butanolate hydrolyses in water to form inorganic potassium 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 potassium hydroxide no data are available since the substance completely dissociates in water and effects are related to a shift in pH values only.
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