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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Administrative data

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The available reliable EC50 values from 11 algal growth inhibition studies, all performed with Pseudokirchneriella subcapitata, vary from 0.2 to > 4.9 mg Al/L (total). Most of the variation in results can be explained by differences in parameters of the test media, i.e. mostly differences in pH and DOC and to a lesser extent hardness.Under standard test (pH, DOC and hardness) conditions, however, aluminium appears to have a low potential for toxicity to freshwater algae.


In a growth inhibition test according to OECD TG 201, the toxicity of a soluble lanthanum salt (LaCl3) to Desmodesmus subspicatus was examined. The 72-h ErC50 and ErC10 of 16 mg/L La and 1.3 mg/L La (both based on measured) corresponding to 24.6 mg/L AlLaO3 and 2.0 mg/L AlLaO3, respectively, indicate that lanthanum has a low potential for toxicity to freshwater algae.

Key value for chemical safety assessment

Additional information