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.
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The 3 h EC50 to activated sludge was 550 mg/L for a C11.6 LAS sodium salt.
Key value for chemical safety assessment
- EC50 for microorganisms:
- 550 mg/L
Additional information
No specific studies on Branched CaDDBS were available. However, a study is available whose purpose was to determine the toxicity of three commercial LAS products to the activated sludge of a treatment plant basically operating on domestic sewage. A contact time of 3 h instead of 15 minutes was chosen to better simulate the real residence time used in wastewater treatment plants (4-6 h). The 3-hr EC50 to activated sludge was 550 mg/L for a C11.6 LAS sodium salt.
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