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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

No toxic effects occur at the range of solubility

Key value for chemical safety assessment

Additional information

Exponentially growing cultures of Scenedesmus subspicatus were exposed to different dilutions of a supersaturated solution of the test item for 72 hours, according to OECD guideline 201.

Inhibition of cell growth was statistically significant only in 100% filtrate of the supersaturated solution of 100 mg/L, whereas significant stimulation of cell growth was recorded in dilutions of the filtrate.

In conclusion, exposure to test concentrations above the maximum solubility did not induce a biologically significant effect on algal

growth. The NOEC and the 72-hour EC50 for both growth inhibition and growth rate reduction were greater than the maximum solubility of the substance in water.