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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Ciba-Geigy Ltd, 1988, is presented as the key information as the reliability rating for this study is 2, according to the criteria of Klimisch, 1997.

Key value for chemical safety assessment

EC50 for freshwater algae:
0.43 mg/L

Additional information

The Ciba-Geigy, 1988 study was performed in accordance to the OECD Guideline for testing number 202.

At the concentration-range tested of 10 -100% (0.087 -0.43 mg/L) of the prepared stock solution of TK10976, algal growth showed no or only very slight inhibition in regard to blank-control.

Results: EC50 (72h): > 0.43 mg/L.