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Diss Factsheets

Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

Description of key information

Results from a long-term invertebrate study on the structural analog calcium bis(dinonylnaphthalenesulphonate) were used for this endpoint. In the original submission for that analog, a long-term aquatic toxicity study on daphnia magna was proposed. In a decision finalized on November 25, 2015, ECHA instructed the registrant to conduct an OECD 211 ecotox study and submit the results in an updated dossier. This submission includes the results of the study. No change in the original aquatic hazard classification was deemed necessary based on the new results. No further testing is proposed or foreseen for the substance.

In a semi-static daphnia reproduction study (OECD 211) with the source chemical Calcium bis(di C8-C10, branched, C9 rich, alkylnaphthalene sulphonate), daphnids were exposed during 21 days at loading rates of 0, 0.46, 1.0, 2.2, 4.6 and 10 mg/L (WAF). Mean measured concentrations were NA, 0.0052, 0.17, 0.14, 0.20 and 0.28 mg/L. Effects on growth were reported at a loading rate of 2.2 mg/L. The NOEL for reproduction and mortality were 4.6 and 10 mg/L(expressed as loading rate). Therefore, it can be expected that the NOEL for the target substance Zinc bis(dinonylnaphthalene sulphonate) would likewise be 4.6 mg/L and 10 mg/L for reproduction and mortality, respectively.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Dose descriptor:
Effect concentration:
0.2 mg/L

Additional information