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Ecotoxicological information

Long-term toxicity to fish

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Description of key information

In the key study a NOEC-values of 0.16 mg/L for mortalilty, 0.11 - 0.28 mg/L for reproduction and 0.33 mg/L for growth are reported. These NOEC-values are not used for PNEC-calculation as a HC5-approach is performed on the basis of chronic tests available for several species of different trophic levels. The HC5 used for PNEC-calculation is determined to be 0.0446 mg/L.

Key value for chemical safety assessment

Additional information

In a study conducted with two different fish species (bluegill sunfish and fathead minnow) the effects of C14 -15 alcohol ethoxylates (7EO) were determined (Dorn et al., 1995, Shell). In two experiments fish were exposed for 10 d in a laboratory assay and for 30 d in an outdoor stream mesocosm. Effect parameters determined were survival and growth of juvenile bluegills and survival and reproduction of fathead minnows. In the laboratory experiment the NOEC for survival and swimming performance of bluegills and for survival of fathead minnows was 0.16 mg/L. In the stream mesocosm the NOEC for bluegill survival and growth was >0.33 mg/L and for fathead minnow survival 0.28 mg/L. There was an indication of decreased egg laying by fathead minnow in the streams at concentrations of 0.33 mg/L or greater. On the basis of the reported results a worst-case NOEC of 0.16 mg/L is assumed.