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 aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
An acute toxicity test was conducted on Daphnia magna exposed to six concentrations of the Branched CaDDBS material (10, 18, 32, 56, 100 and 180 mg/L). The resultant 48 h EC50 was between 56 and 100 mg/L. A supporting study demonstrated that linear material is more toxic than the branched equivalent.
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 62 mg/L
Additional information
In a key study, an acute toxicity test was conducted on Daphnia magna exposed to six concentrations of the Branched CaDDBS material (10, 18, 32, 56, 100 and 180 mg/L) plus controls. The resultant 48 h EC50 was reported by the authors as between 56 and 100 mg/L and subsequently calculated using Probit software as a 48 h EC50 = 62 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 Daphnia magna acute toxicity experiments. Results of the toxicity tests show that LAS is more toxic than BAS. The key value is 62 mg/L from the key study.
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