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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

With high probability not harmful to aquatic algae. 
No toxic effects occur at the range of the substances solubility.
EC50 (72h) > 100 mg/L and NOEC (72h) >= 100 mg/L (nominal, WSF) for growth rate of Desmodesmus subspicatus (OECD 201)

Key value for chemical safety assessment

Additional information

In a GLP guideline study following OECD 201 green algae (Desmodesmus subspicatus) were exposed for 72 hours to

Fatty acids, C16-18 and C18-unsatd., Me esters, epoxidized [BASF SE, 2013]. Based on the low water solubility of the test item a water soluble fraction (WSF) was prepared and the test was conducted as limit test with a nominal loading concentration of 100 mg/L. No algal growth inhibition was observed in the treatment compared to the control. Thus, the 72-h NOEC for growth rate inhibition is determined to be >= 100 mg/L based on nominal loading concentration.