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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

In this study 2,2’-(Octylimino)bisethanol was found to inhibit the growth of the freshwater green alga Desmodesmus subspicatus after 72 hours. The NOEC-values for inhibition of growth rate and inhibition of yield after 72 hours were 0.253 and 0.0800 mg/L, respectively . The LOEC-values for inhibition of growth rate and inhibition of yield after 72 hours were 0.800 and 0.253 mg/L. The EC50-values for inhibition of growth rate (ErC50) and yield (EyC50) with 95 % confidence intervals after 72 hours were 1.35 (1.30 – 1.41 and 0.397 (0.363 – 0.433) mg/L, respectively. All effect levels are given based on nominal concentrations of 2,2’-(Octylimino)bisethanol.

Key value for chemical safety assessment

EC50 for freshwater algae:
1.35 mg/L
EC10 or NOEC for freshwater algae:
0.402 mg/L

Additional information

In this study 2,2’-(Octylimino)bisethanol was found to inhibit the growth of the freshwater green alga Desmodesmus subspicatus after 72 hours. The NOEC-values for inhibition of growth rate and inhibition of yield after 72 hours were 0.253 and 0.0800 mg/L, respectively . The LOEC-values for inhibition of growth rate and inhibition of yield after 72 hours were 0.800 and 0.253 mg/L. The EC50-values for inhibition of growth rate (ErC50) and yield (EyC50) with 95 % confidence intervals after 72 hours were 1.35 (1.30 – 1.41 and 0.397 (0.363 – 0.433) mg/L, respectively. All effect levels are given based on nominal concentrations of 2,2’-(Octylimino)bisethanol.