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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The toxicity of trans-N1,N1,N4,N4-Tetrakis(2-hydroxyethyl)1,4-cyclohexanedicarboxamide to the unicellular freshwater green alga Pseudokirchneriella subcapitata was determined according to the principles of OECD Guideline for Testing 201 (2006) and Council Regulation (EC) No. 440/2008 Method C.3 (2008) over a period of 72 hours.  A limit concentration of 100 mg/L was tested. Six replicates were tested for the limit concentration and the control. No inhibition on growth of the freshwater green alga Pseudokirchneriella subcapitata was found after 72 hours of exposure to the test substance. The NOEC for both inhibition of specific growth rate and yield after 72 h was 100 mg/L.

Key value for chemical safety assessment

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

Additional information