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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

EC50 (72h) = 200 mg/L, EC10 (72h) = 73 mg/L (nominal, growth rate) for Desmodesmus subspicatus (OECD 201) 

Key value for chemical safety assessment

EC50 for freshwater algae:
200 mg/L
EC10 or NOEC for freshwater algae:
73 mg/L

Additional information

One study investigating the toxicity of Reaction mass of sodium hydrogen N-(1-oxooctadecyl)-L-glutamate and stearic acid to algae are available. The study was performed according to GLP and OECD guideline 201 using Desmodesmus subspicatus as test organism (Fresenius, 2004). Nominal concentrations between 62.5 and 1000 mg/L were tested over a period of 72 h. The 72h-EC50 is determined to be 200 mg/L and the 72h-EC10 is determined to be 73 mg/L based on nominal test concentrations.