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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The EC50 for aquatic algae and cyanobacteria was based on the 72 hour ECr50 (growth rate inhibition) from the key study on Desmodesmus subspicatus (BASF, 1990). 

Key value for chemical safety assessment

EC50 for freshwater algae:
140 mg/L

Additional information

The 72-hour ECr50 of 141.42 mg/L for Desmodesmus subspicatus was the representative value for the short-term toxicity of 4,4'-methylenebis(cyclohexylamine) to aquatic algae and cynaobacteria. This value represented one of the three short-term aquatic toxicity values for each of three trophic levels (fish, aquatic invertebrates, and aquatic algae and plants). The lowest of the three short-term aquatic toxicity values from each of the three trophic levels was used as the point of departure for the derivation of the PNECaquatic (freshwater).