Registration Dossier
Registration Dossier
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EC number: 273-234-6 | CAS number: 68953-96-8 This substance is identified by SDA Substance Name: C11-C13 branched alkyl benzene sulfonic acid calcium salt and SDA Reporting Number: 25-097-06.
Endpoint summary
Administrative data
Description of key information
Additional information
The biodegradability of Branched CaDDBS was determined in accordance with OECD Guideline 301E. Results indicate limited biodegradation, with a final biodegradation of 2.9% at 28 days. The substance is not readily biodegradable. In addition, 11 fish were exposed to 1 mg/L of Branched alkylbenzene sulfonate for 196 days. The test substance was labeled with sulfur-35 in order to determine the amount that biodegraded. Results at the end of the test period show that the test substance was 97.8% biodegraded in 196 days. Analysis of the amount of radiolabeled sulfur in the suspended solids and in the fish shows that most of the test substance was removed by biodegradation rather than adsorption or bioaccumulation. Simulation testing of ultimate biodegradation in surface water and sediment is not required based on the results of the chemical safety assessment, which indicates RCRs <1 for the aquatic and sediment environments. Likewise, biodegradation testing in soil is not required as the chemical safety assessment indicates RCRs <1 for the terrestrial environment. The key value for CSA for Branched CaDDBS is considered to be "inherently biodegradable."
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