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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

An OECD 201 compliant study with the green algae Desmosdesmus subspicatus was conducted over 72 hours under GLP. Test loading levels of 0.625, 1.25, 2.50, 5.00 and 10 mg/L were investigated for effects on growth rate and yield inhibition under static conditions. The test loading levels were analytical verified and in the range of 80% to 120% of nominal. After 72 hours the EC50 values for inhibition of growth rate and yield were 0.976 and 0.762 mg/L, respectively. The EC10 values for inhibition of growth rate and yield were 0.658 and < 0.625 mg/L, respectively. All validity criteria were met.

Key value for chemical safety assessment

EC50 for freshwater algae:
0.976 mg/L
EC10 or NOEC for freshwater algae:
0.658 mg/L

Additional information