Registration Dossier
Registration Dossier
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EC number: 254-259-1 | CAS number: 39049-04-2
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Aquatic toxicity studies of neodecanoic acid, zirconium salt are not available. Read-across to the assessment entities zirconium substances and neodecanoic acid is applied since the ions of neodecanoic acid, zirconium salt determine its fate and toxicity in the environment. Zirconium is poorly soluble and precipitates under most environmental conditions whereas neodecanoate is rather mobile. Although, in a 72-h test according to OECD 201 (2006) with zirconium dioxide a 72 -h NOErL (growth rate) of 32 mg ZrO2/L was determined for D. subspicatus, the inhibitory effect on the growth of algae may be explained (at least in part) with the measured simultaneously occurring phosphate depletion in the growth medium. Further, the derived EL50 was above the respective OECD test limit. The toxicity of neodecanoic acid was evaluated, yielding a 72-h EL50 of >100 mg neodecanoic acid /L for the inhibition of growth of P. subcapitata. Thus, neodecanoic acid, zirconium salt has a low potential for toxicity to aquatic algae and cyanobacteria.
Key value for chemical safety assessment
Additional information
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