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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

In a 72 hour acute toxicity study, the cultures of Desmodesmus subspicatus were exposed to Ettringit under static conditions in accordance with the OECD 201 Guideline. 

Key value for chemical safety assessment

EC50 for freshwater algae:
47.4 mg/L
EC10 or NOEC for freshwater algae:
2.3 mg/L

Additional information

The EC50 based on biomass was 4.8 mg/l.

No abnormalities were noted. 

The study is classified as acceptable and satisfies the guideline requirements for algae toxicity study.