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Long-term toxicity to fish

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Description of key information

14d NOEC (Danio rerio, mortality) = 1.65 mg/L (nominal concentration, UBA guideline equivalent to OECD 204)

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
1.65 mg/L

Additional information

Two non-GLP 14-day studies with fish are available for C16-18AS Na (CAS 68955-20-4, Richterich 2001, Steber 1988), both reporting the same results. The test was performed according to a German UBA method for a prolonged toxicity test with zebra fish, equivalent to OECD 204 guideline. Zebrafish (Danio rerio) were exposed for 14 days under semi-static conditions to five test concentrations up to 30 mg/L of the test substance of 55% purity, corresponding to 16.5 mg a.i./L. No analytical measurements are available. The 14-day NOEC value was determined to be 1.65 mg a.i./L (nominal concentration). Although the observations cover only the sub-chronic toxicity, they can be treated as chronic effects. As the results show, mortality of fish occurred at the concentrations of 10 mg/L of product and higher (equal to 5.5 mg a.i./L). Fish mortality reaching 80% and more was seen already on day 2. Moreover, no toxic effects were recorded at the concentration of 3 mg product/L (equal to 1.65 mg a.i./L) though the whole testing period. Therefore, the reliable long term NOEC value for fish can be 1.65 mg a.i./L.