Registration Dossier
Registration Dossier
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EC number: 205-251-1 | CAS number: 136-53-8
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
For the substance as such, zinc bis(2-ethylhexanoate), no aquatic toxicity studies are available. Thus, read-across to the assessment entities soluble zinc substances and 2-ethylhexanoic acid is applied since the ions of zinc bis(2-ethylhexanoate) determine its fate and toxicity in the environment.
Zinc: Regarding zinc toxicity to freshwater algae, the lowest IC50 amounts to 0.136 mg Zn/L (Selenastrum capricornutum) and the lowest NOEC is the geomean of 0.019 mg Zn/L (Pseudokircherniella subcapitata) whereas the NOECs for chronic toxicity to marine algae range from 0.0078 to 0.67 mg/L (dissolved concentrations). The respective species NOEC/EC10 values are applied in the species sensitivity distribution approach.
2-ethylhexanoic acid: An EC50 (72h) of 49.3 mg/L was derived in a study with the freshwater algae species Desmodesmus subspicatus.
In sum, zinc bis(2-ethylhexanoate) seems to have potential for toxicity to aquatic algae and cyanobacteria.
Key value for chemical safety assessment
Additional information
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