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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Sodium2-methylpropan-2-olate hydrolsyses in water to form inorganic sodium hydroxide and tert-butanol. Whereas inorganic substances can not biodegrade, tert-butanol was biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable but failing 10-day window

Additional information

Sodium 2-methylpropan-2-olate hydrolsyses in water to form inorganic sodium hydroxide and tert-butanol. The biodegradability of tert-butanol was studied in a CO2 -headspace test conducted according to ISO guideline 14593. After 28 days of exposure a biodegradation of 70 - 80 % were observed. However, tert-butanol is not considered to be readily biodegradable, since the required 10 -day window was not met. Therefore the test substance is regarded as biodegradable but not as readily biodegradable according to OECD criteria.