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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Readily biodegradable according to OECD criteria: 95% after 28 days (EU method C.4-A)

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

Three reliable ready biodegradability tests are available for C12-14AS TEA (CAS 90583-18-9). The key, GLP test was performed according to EU C.4-A method (Diefenbach 1995) using activated, domestic, non-adapted sludge as inoculum. The initial concentration of the test substance was 13.58 mgL as DOC. The biodegradation reached 87% after 7 days and 95% after 28 days based on DOC removal. Another GLP test is available for C12-14AS TEA (CAS 90583-18-9), performed according to modified OECD screening method (Richterich 1991). The initial concentration of the test substance was 10 mg/L (given as carbon). Biodegradation reached 95% after 10 days and 98% after 28 days based on DOC removal. Third, non-GLP test available for C12-14AS TEA (CAS 90583-18-9) was performed according to OECD 301 E guideline (Henkel, 1999). Municipal sewage treatment plant effluent was used as inoculum and the initial concentration of the test substance was 10 mg/L as DOC. Biodegradation reached 72% after 3 days and 98% after 28 days measured as DOC removal.

Based on the above information it can be concluded that C12-14AS TEA (CAS 90583-18-9) is readily biodegradable based on OECD criteria.