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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

Based on the results of the read across study, the 48h EC50 for Daphnia magna due to exposure to the test substance was considered to be >100 mg a.i./L.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
100 mg/L

Additional information

A study was conducted to determine the short-term toxicity of the read across substance, mono- and di- C16 -18 PSE, to aquatic invertebrates according OECD guideline 202, in compliance with GLP. Based on range-finding study, Daphnia magna were exposed to a test concentration of 100 mg/L (WAF) for 48h. The WAF and the control were analytically verified by spectrophotometric analysis of the total phosphor content at the start of the exposure intervals (fresh media, 0 and 24h) and at the end of the exposure intervals (old media, 24 and 48h). The recovery rates at the end of the exposure interval were found to be within the +/- 20% of the initially measured values; hence the test concentrations were expressed in terms of nominal loading concentrations. A positive control (potassium dichromate) was included in the experiment. No immobilised animals were reported in the control group or in the test group.Based on the results of the read across study, the 48h EC50 (Daphnia magna) was determined to be >100 mg a.i./L(Noack, 2013).