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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Based on the Key study results the estimated NOEC of Chlorella  vulgaris for aluminium potassium bis sulphate is 133.3 mg/L.

Key value for chemical safety assessment

EC10 or NOEC for freshwater algae:
133.3 mg/L

Additional information

Based on the Key study results the estimated NOEC of Chlorella vulgaris for aluminium potassium bis sulphate is 133.3 mg/L.

In a supporting study by DeForest et al., experimental data on the toxicity of aluminium to a green alga (P. subcapitata) is summarized. Within these data, the EC10 (72 hours, Pseudokirchneriella subcapitata) for Aluminum varies over a wide range (146 - 3154 µg Al/lcorresponding to ca. 1.4 -  30.5 mg/l aluminum potassium bis(sulphate)) depending on the water characteristics (pH, DOC, hardness). The actual aluminum compound used as test material was not specified.