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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The substance exhibits an ErC50 for freshwater algae of 0.56 mg/L and an NOEC of 0.1 mg/L.

Key value for chemical safety assessment

EC50 for freshwater algae:
0.56 mg/L
EC10 or NOEC for freshwater algae:
0.1 mg/L

Additional information

A reliable study in accordance with OECD guideline 201 and GLP is available. Cultures of Pseudokirchneriella subcapitata were at nominal concentrations of 0 (control), 0.022, 0.046, 0.10, 0.22, 0.46 and 1.0 mg/L for 72 h, under constant illumination and shaking in a water bath at a temperature of 22 °C. Chemical analysis revealed that the measured concentrations of the test item in the test media of the test concentrations 0.10-1.0 mg/L were 107-114 % of the nominal values at the start of the test and 94-108 % of the nominal values at the end of the test. The ErC50 to green algae (Pseudokirchneriella subcapitata) was determined to be 0.56 (0.53-0.60), the No Observed Effect Concentration (NOEC) and Lowest Observed Effect Concentration (LOEC) were 0.10 and 0.22 mg/L (nominal), respectively.