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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

No measured data was available regarding the toxicity of Corfree® M1 to aquatic plants.  Using The toxicity of the read across chemical, dodecanedioic acid, on the alga Desmodesmus subspicatus was tested over a period of 72 hours according to OECD TG 201. Five concentrations ranging from 6.25 to 100 mg/L (nominal) were tested. The results of this study show that the test substance dodecanedioic acid induced inhibition of algal growth from 16.6 mg/L (measured) upwards with an EC50 (72h) for growth rate of > 38.6 mg/L (geometric mean) and a NOEC of 11.1 mg/L (measured).

Key value for chemical safety assessment

EC50 for freshwater algae:
38.6 mg/L

Additional information

No measured data was available regarding the toxicity of Corfree® M1 to aquatic plants.  Using The toxicity of the read across chemical, dodecanedioic acid, the ErC50 (72 h) based on measured concentrations was determined as > 38.6 mg/L, indicating that the test substance does not pose a significant hazard to algae. The > 38.6 mg/L ErC50 (72 h) represents a value in excess of the substance's solubility in water.