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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

72 h ErC10: 48 mg/L
72 h ErC50: > 100 mg/L

Key value for chemical safety assessment

EC50 for freshwater algae:
100 mg/L
EC10 or NOEC for freshwater algae:
48 mg/L

Additional information

In the Klimisch 1 GLP study from Kimmel (2013) the toxicity of Aspartic acid, N-(3-carboxy-1-oxo-sulfopropyl)-N-(C16-C18 (even numbered), C18 unsaturated alkyl) tetrasodium salts to Desmodesmus subspicatus was determined in a static 72-Hour Algal Growth Inhibition Test. The test was performed according to OECD 201 and EU Method C.3. The nominal concentrations of the test item of 9.19, 18.4, 36.8, 73.5, 147 and 294 mg test item/L(corresponding to 3.125, 6.25, 12.5, 25, 50 and 100 mg solid content/L) were tested in parallel with a control. Dose verification analysis was performed . The measured concentrations of the test item in the biologically relevant test media of the nominal test concentrations of 36.8 to 294 mg test item/L were between 87 and 105% of the nominal values at the start of the test and between 85 and 97% at the end of the test. In order to determine the growth of the cultures, the cultures were measured with the fluorescent method . The cell density was determined at 0, 24, 48 and 72 hours. The growth of the control cultures fulfilled the validity criteria from OECD 201 (2006). The 72 -hour ErC10 and ErC50 are 48 and > 100 mg solid content/L based on the mean measured concentration.

This information is considered to be relevant and reliable for the further risk assessment.