Registration Dossier
Registration Dossier
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 273-257-1 | CAS number: 68955-19-1 This substance is identified by SDA Substance Name: C12-C18 alkyl alcohol sulfuric acid sodium salt and SDA Reporting Number: 16-062-04.
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
In accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5, read-across to other structurally related category members was conducted. Read-across data for similar substances, C12-14AS Na (CAS 85886-07-8), C16-18AS Na (CAS 68955-20-4) and C14AS Na (1191-50-0) was used.
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.
One reliable non-GLP simulation test with C16-18AS Na (CAS 68955-20-4) according to OECD 303 A guideline is available (Richterich 2001). Adapted activated sludge from municipal sewage treatment plant was used as inoculum and the initial concentration of the test substance was 20 mg/L as DOC. The inoculum was adapted to synthetic waste water for one week. Biodegradation measured as DOC removal reached 96% after 30 days.
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.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
