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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The short term toxicity of ditantalum pentaoxide to aquatic algae and cyanobacteria was studied in Desmodesmus subspicatus and was determine to have an EC0 of ≥ 1 mg/L in freshwater according to a key study (Caspers, 2000) performed in line with standardised guidelines OECD 201 and  EU Method C.3.

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Additional information

The key study (Casper, 2000) was conducted in line with GLP and standardised guidelines with a sufficient level of detail to assess the quality of the study. Desmodesmus subspicatus was exposed under static freshwater conditions to the test material for 72 hours. The algae were exposed to the test material at a nominal concentration of 1 mg/L. Under the conditions of the test no signs of toxicity were observed. The study determined the ECof the test material to be ≥1 mg/L where the EC₅₀ is above the limits of solubility.