Registration Dossier
Registration Dossier
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EC number: 400-830-7 | CAS number: 104810-48-2 EVERSORB 80; TINUVIN 1130; TINUVIN 213
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
With high probability acutely not harmful to aquatic algae.
Key value for chemical safety assessment
Additional information
There are two studies available for the determination of the toxicity to aquatic algae, both according to OECD guideline 201 with analytical monitoring of test substance concentration. The older study used DMSO as solubilizer to increase the water solubility of the test substance. Selenastrum capricornutum was exposed to the substance and changes in the biomass of the algae were recorded. The EbC50 determined after 72 hours of exposure was > 9 mg/l (Ciba-Geigy, 1987), which exceeded the water solubility for both the monoester and the diester component of the substance.
On request of UK authorities this study was repeated using water accomodated fractions to prepare the test solutions. Here, the ErC50 could be determined to be > 100 mg/L (Ciba, 2009).
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