Registration Dossier
Registration Dossier
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EC number: 271-808-0 | CAS number: 68608-89-9 This substance is identified by SDA Substance Name: C11-C13 branched alkyl benzene sulfonic acid sodium salt and SDA Reporting Number: 25-097-04.
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
The 48-Hour EC50 for the test item to Daphnia magna based on mean measured test concentrations was 0.83 mg/L a.i.; 95% confidence limits 0.76-0.94 mg/L a.i. The No Observed Effect Concentration was 0.55 mg/L a.i. Correspondingly the Lowest Observed Effect Concentration was considered to be 1.1 mg/L a.i.
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 0.83 mg/L
Additional information
A study was performed to assess the acute toxicity of the test item toDaphnia magna. The method followed was designed to be compatible with the OECD Guidelines for Testing of Chemicals (April 2004) No 202, "Daphnia sp., Acute Immobilisation Test" referenced as Method C.2 of Commission Regulation (EC) No. 440/2008. Given these results it was considered appropriate to calculate the results based on the mean measured test concentrations. The 48-Hour EC50for the test item toDaphnia magnabased on mean measured test concentrations was 0.83 mg/L a.i.; 95% confidence limits 0.76 -0.94 mg/L a.i. The No Observed Effect Concentration was 0.55 mg/L a.i. Correspondingly the Lowest Observed Effect Concentration was considered to be 1.1 mg/L a.i.
Based on the data for linear and branched alkylbenzene sulfonates, linear structures are more toxic than branched structures. Therefore, data on linear materials, e.g., the chronic aquatic studies using LAS, are considered to be a worst case scenario.
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