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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Link to relevant study record(s)

Description of key information

A number of short-term studies are summarised and reviewed in the EU RAR and Dutch ICD.  The EC50 values for freshwater algae are reported to range from 43 to 122 mg/L (as fluoride ion, F-). For marine algae the EC50 was 81 mg/L in a single study with Skeletonema costatum. In long-term studies, NOEC values of 50 -249 mg/L and 50 -200 mg/L are reported for freshwater and marine algae, respectively.

Key value for chemical safety assessment

EC50/LC50 for freshwater algae:
43 mg/L
EC50/LC50 for marine water algae:
81 mg/L
EC10, LC10 or NOEC for freshwater algae:
50 mg/L
EC10, LC10 or NOEC for marine water algae:
50 mg/L

Additional information

The EU RAR reviews and summarises the available data on the short-term toxicity of sodium fluoride to freshwater and marine algae species. The EC50 values for freshwater algae are reported to range from 43 to 122 mg/L (as fluoride ion, F-). For marine algae the EC50 was 81 mg/L in a single study with Skeletonema costatum.

In long-term studies, NOEC values of 50 -249 mg/L and 50 -200 mg/L are reported for freshwater and marine algae, respectively.