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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

Description of key information

In the key study, no toxicity to daphnia was observed at concentrations up to 1000 mg/L. Nominal concentrations: 48-h EL50 (reported as “EC50” in the report) >1,000 mg/L. 48-h NOELR (reported as “NOEC” in the report)  < 1000 mg/L based on WAF loading rates. Effect concentrations were based on nominal loading rates. Test results reported in original study as “effect concentrations” (EC) are reported in this summary as “effective loading” (EL), because test results are based on WAF loading rates and not measured concentrations. Similarly, the “no observed effect concentration (NOEC) in the report is presented as “no observed effect loading rate” (NOELR) in this summary.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
1 000 mg/L

Marine water invertebrates

Marine water invertebrates
Effect concentration:
1 000 mg/L

Additional information

Representative alkarylsulfonate salts have been tested in two seperate testing programs by the American Chemistry Council. In addition, the registrant has proprietary data for an additional substance. While all studies are equally valid, the study on CMA 604 is selected as the Key Study to fulfill the endpoint requirement as the substance most chemically similar to the substance being registered based on primary alkyl range used for manufacture and metal salt (calcium) used for neutralization. In this study, the substance was tested in a WAF prepared with concentrations up to 1000 mg/L loading rate. No toxicity to aquatic invertebrates was observed in any study at any loading rate tested. The NOEC for aquatic vertebrates based on all available data is 1000 mg/L WAF

The toxicity of the substance has not been assessed using a marine invertebrate species. However, based on the lack of toxicity to any species tested, it is likely the NOEC is similar to freshwater species. Therefore the value of 1000 mg/L is used to calculate the PNEC for marine invertebrates.