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EC number: 500-513-4 | CAS number: 161074-79-9 1 - 2.5 moles ethoxylated
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The substance is readily biodegradable in water
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
One reliable study on the biodegradation of AES (C12-13, 1-2.5EO) Na (CAS 161074-79-9) is available. In that non-GLP study aerobic degradation of the mixture was tested according to OECD 301B. Based on CO2 -evolution biodegradation ranged from 71% (for 10 mg/L test substance) and 66% (20 mg/L test substance) after 35 days (Unilever, 1988a). As the substance tested contains low amounts of active substance (approximately 25%), additional read-across to data available for alcohol C12 -14 ethoxysulfates (2EO) is prepared. The read-across study is conducted according to the EU-guideline C.4 -A under GLP. In that study a biodegradation of 100% based on DOC-removal is reported after 28 days of exposure. Both studies were used for a weight of evidence approach.
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