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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Readily biodegradable: 83.6% (CO2 evolution) in 28 days (OECD 301B)

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

All members of the category alcohol ethoxylates are readily biodegradable which is proved by several studies available for the certain mixtures.

As there are no data available for alcohol ethoxylate ((Z)-9-Octadecen-1-ol ethoxylated, < 2.5 EO, CAS 9004-98-2) the biodegradability is assessed on the basis of data from a study with a similar alcohol ethoxylate (C18, < 2.5 EO, CAS 9005-00-9). The read across study was conducted according to OECD guideline 301B under GLP conditions (Croda, 2005). Based on CO2 evolution, the test item attained 83.6% degradation after 28 days of incubation. Hence, the substance can be classified as readily biodegradable under the strict OECD requirements.