Registration Dossier
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EC number: 287-809-4 | CAS number: 85586-07-8
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
C12-14AS Na (CAS 85586-07-8) was completely removed and there was no indication of the presence of any biodegradation residues or non-biodegradable minor components (OECD 303A)
Key value for chemical safety assessment
Additional information
The key simulation biodegradation test with C12-14AS Na (CAS 85886-07-8) was conducted according to OECD 303 A by Potoms (1992). It was demonstrated that approximately 100% of the DOC were eliminated using domestic non-adapted activated sludge after 67 days. There was no indication of the presence of any biodegradation residues or non-biodegradable minor components.
Additionally, in accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5, a read-across to another structurally related category member was conducted. Read-across data for C14AS Na (1191-50-0) was used, as this is one of the constituents of C12-14AS Na (CAS 85886-07-8). Two supporting studies performed according OECD guideline 314 B and 314 D (Federle 1996a, Federle 1996 b, respectively) are available for C14AS Na (1191-50-0). The OECD 314 B test showed that the removal of C14AS Na (CAS 1191-50-0) was around 98.5% in two activated sludge die-away tests (24 hours). The substance was mineralized (66-69%), incorporated into solids (20-26%), transformed into a metabolite (6-10%), or remained as parent (1.5-2%), after 24 hours. The OECD 314 D test revealed that the substance was completely removed from surface water. After 23 hours 53% was mineralized, 40% was non-extractable (solids), and no substance remained as either parent compound or metabolite. The rate constants for primary biodegradation, ultimate biodegradation, and mineralization in surface water were 3.17, 2.12, and 0.34 h-1, respectively.
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