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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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The available reliable EC/LC50 values of five aquatic invertebrate species from twelve short-term toxicity studies vary from 0.071 to > 99.6 mg Al/L (total). Most of the variation in results can be explained by differences in pH, hardness and DOC of the test media. Under standard test (pH, DOC and hardness) conditions, however, aluminium appears to have a low potential for toxicity to freshwater invertebrates.


In an acute immobilisation test according to OECD TG 202, the toxicity of a poorly soluble lanthanum substance (La2O3) to Daphnia magna was examined. The 48-h EC50 of > 100 mg/L La2O3 mg/L (nominal 85.3 mg/L La) corresponding to > 326 .8 mg/L AlLaO3 indicate that lanthanum is not toxic to freshwater invertebrates. Supporting studies of Daphnia carinata (48-h EC50 of 1.2 mg/L La corresponding to 1.8 mg/L AlLaO3), Hyalelle azteca (7d-EC50 of 1.7 mg/L La corresponding to 2.6 mg/L AlLaO3), Tubifex tubifex (96-h EC50 29.4 mg/L La corresponding to 45.3 mg/L AlLaO3) and Cypris subglobosa (48-h EC50 of 41.5 mg/L La corresponding to 63.9 mg/L AlLaO3) further point to a low potential for toxicity to freshwater invertebrate species.

Key value for chemical safety assessment

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