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 terrestrial arthropods
Administrative data
Link to relevant study record(s)
Description of key information
Four studies on LAS involving arthropods were used in developing the soil PNEC. The results demonstrate that EC10 and NOEC values ranged from 82 to 205 mg/kg soil dw.
Key value for chemical safety assessment
- Long-term EC10, LC10 or NOEC for soil dwelling arthropods:
- 82 mg/kg soil dw
Additional information
No specific studies on Branched CaDDBS are available. However, four studies are available for the effects of LAS on soil arthropods. In the first, groups of H. assimilis and H. aculeifer were exposed for 21 days and the number of offspring counted. Based on reproduction, The EC10 for H. assimilis was 100 mg/kg dry weight, and the EC10 for H. aculeifer was 82 mg/kg dry weight. In the second study, groups of Folsomia fimetaria were exposed in three different soil types for 21 days and the number of adult and juvenile organisms counted. Another test was done to compare the toxicity of three LAS salts, Na, Ca, and Mg, in one soil type (sandy). There was little variation in toxicity among the three soil types and in the three salt species. The EC10 for Folsomia fimetaria in various soils ranged from 85-93 mg/kg dry weight soil. In the third study, groups of F. candida were exposed to concentrations of 25-300 mg LAS/kg soil for 28 days, after which adult survival and reproductive parameters were examined. The EC10 based on reproduction was 205 mg/kg soil. In the final study, groups of Folsomia fimetaria were exposed to nominal concentrations of 50, 100, 200, 400, and 800 mg/kg soil dw of LAS for 21 days. The resultant EC10 was 161 mg/kg soil dw based on reproduction.
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