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.
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
An acute toxicity study conducted in accordance with OECD Guideline 203 using Zebra fish resulted in a 96 h LC50 of between 10 and 100 mg/L. A series of tests in a supporting study demonstrated that the branched material is less toxic than the linear material.
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 31.6 mg/L
Additional information
In the key study, an acute toxicity test was conducted on a Branched CaDDBS using Zebra fish in accordance with OECD Guideline 203. Test concentrations were 0, 1, 10, and 100 mg/L. No mortality or other effects were observed in the control, 1 and 10 mg/L exposures. The 100 mg/L exposure showed complete mortality and other toxic symptoms. The resultant 96 h LC50 was between 10 and 100 mg/L and the geometric mean was calculated to determine the LC50 of 31.6 mg/L. In a supporting study, eight samples of sewage water were collected, two test substances, LAS and BAS were then added, and the biodegradation of the substances followed for 168 h. At the times 0, 16, 24, 40, 48, 72, and 168 h, samples from the biodegradation tests were taken, and these samples were used in 24 h zebra fish acute toxicity experiments. Results of the toxicity tests show that LAS is more toxic than BAS.
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