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Long-term toxicity to aquatic invertebrates

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Description of key information

The chemical safety assessment according to Annex I of Regulation (EC) No. 1907/2006 does not indicate the need to investigate further the long-term toxicity to aquatic invertebrates.

Key value for chemical safety assessment

Additional information

No data evaluating the chronic toxicity of Glycerides, palm-oil mono-, hydrogenated, acetates (CAS No. 93572-32-8) to aquatic invertebrates are available. The environmental exposure assessment performed for this substance (see Chapters 9 and 10 of the CSR for detailed information) shows that the Risk Characterization Ratios (i.e. PEC/PNEC ratio) in the aquatic compartment (freshwater and marine) are < 1 and therefore, under the current exposure conditions, Glycerides, palm-oil mono-, hydrogenated, acetates does not pose a risk to aquatic organisms and further testing is not deemed necessary according to Regulation (EC) No. 1907/2006, Annex XI, section 3.

 

Glycerides, palm-oil mono-, hydrogenated, acetates is readily biodegradable (86.7% in 28 days) and therefore, according to the Guidance on information requirements and chemical safety assessment, Chapter R.7b (ECHA, 2008), this substance will undergo rapid and ultimate degradation in most environments, including biological Sewage Treatment Plants (STPs). Based on this information, concentrations of the substance into the aquatic compartment from STP releases and therefore, the bioavailability to aquatic organisms, are expected to be low.Furthermore, the substance exhibits a log Koc value > 3. Therefore, once the substance enters conventional STPs, it is expected to be removed from the water column to a significant degree by adsorption to sewage sludge (Guidance on information requirements and chemical safety assessment, Chapter R.7a, (ECHA, 2008)) and the rest will be extensively biodegraded (due to ready biodegradability).Based on the results of the acute tests performed with species representing three different trophic levels (fish, aquatic invertebrates and algae), algae was the species showing the highest sensitivity to Glycerides, palm-oil mono-, hydrogenated, acetates. In the available algae study, a NOEC (72 h) of 0.565 mg/L was reported. Furthermore, in the acute test performed on Daphnia magna, a relatively high EC50 value of 64.4 mg/L was obtained. This fact in combination with the observed precipitation of test material in all test solutions indicates that physical effects were most probably involved.