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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Analytical measurement of the test item concentrations was not performed during this study as the limit of solubility of Intermediate 36 is below  the lowest level of quantification. All values indicated in the key parameter section below are calculated as the percentage of the limit of solubility and refer to the growth rate.

Key value for chemical safety assessment

EC50 for freshwater algae:
113.4 mg/L
EC10 or NOEC for freshwater algae:
50 mg/L

Additional information

The 72h EC50 based on growth rate was determined as 113.4 % of the limit of solubility in a 72h algal growth inhibition test on Pseudokirchneriella subcapitata with Intermediate 36. The 72h EC50 based on yield was 80.8 % of the limit of solubility. The overall NOEC was determined to be 50.0 % of the limit of solubility. Analytical measurement of the test item concentrations was not performed during this study as the limit of solubility of Intermediate 36 is below the lowest level of quantification. All values above are calculated as the percentage of the limit of solubility.