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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

RA_CAS 70024-69-0, OECD 301D: 8 % degradation after 28 days (Douglas, 1989)

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

Experimental results for the biodegradation of the Benzenesulfonic acid, mono-C20-24 (even)-sec-alkyl derivs., para-, sodium salts (generic name: C20-24 sodium sulfonate) are not available. However, biodegradation studies were performed with three structural analogues of the C20-24 sodium sulfonate. Referring to the key study, calcium sulfonate read-across substance (Analogue of CAS 70024-69-0) attained 8 % degradation during the test duration of 28 days (OECD Guideline 301D, Douglas, 1989). With regard to the supporting studies, Sanitised, O. (1996) determined 8.6 % degradation after 28 days (OECD Guideline 301F) for the calcium sulfonate read-across substance (CAS 61789 -86 -4) while 9.1 % degradation was attained for the calcium sulfonate read-across substance (CAS 68783-96-0) after 28 days (OECD Guideline 301B, Sanitised, P. 1995). Based on the results of these studies, the C20-24 sodium sulfonate is not expected to be readily biodegradable.