Registration Dossier
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EC number: 243-697-9 | CAS number: 20292-08-4
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
No toxic effects up to the limit of water solubility for Daphnia magna (EU Method C.2)
Key value for chemical safety assessment
Additional information
Since no studies are available on the short-term aquatic invertebrate toxicity of 2-ethylhexyl laurate (CAS No. 20292-08-4), the assessment of short-term toxicity was based on studies conducted with the structurally most similar category members, for which data is available, isopropyl myristate (CAS No. 110-27-0) and isopropyl palmitate (CAS No. 142-91-6), as part of a read across approach, which is in accordance with Regulation (EC) No. 1907/2006, Annex XI, 1.5. Grouping of substance and read across approach. Further justification is given within the endpoint summary 6.1 and within the category justification Section 13. In this case of read-across, the best suited (highest degree of structural similarity, nearest physico-chemical properties) read-across substance was entered into IUCLID. Nevertheless, as can be seen in the data matrix of the category justification in Section 13, all reliable data in the category support the hazard assessment for this endpoint, by showing a consistent pattern of results.
The key study with isopropyl myristate (CAS No. 110-27-0) was performed as a limit test according to EU Method C.2 and GLP (Stelter, 1995). The test organism Daphnia magna was exposed to the test substance in a static system for 48 hours. Three different methods were used for the preparation of test solutions: 1) direct addition to 100 mg/L, 2) direct addition to 100 mg/L with removal of undissolved test substance and 3) 3-5 times saturation without separation of undissolved material. With the first method an oil film was observed at the surface, and up to 100% immobilisation occurred. With the other two methods, no significant effect was observed. Based on the results, the observed immobilisation is most probably due to physical effects caused by undissolved test substance. It can therefore be concluded that the test substance had no significant toxic effect on the test organism up to the limit of water solubility. A measured EC50 of > 0.05 mg/L was reported.
The key study with isopropyl palmitate (CAS No. 142-91-6), used as key study, was performed according to EU Method C.2 and GLP (Kirch, 1998). The test organism Daphnia magna was exposed to the test substance in a static system for 48 hours, at nominal test concentrations of 1000 and 3000 mg/L (measured initial concentrations 0.72 and 1.68 mg/L). No mortalities were observed at any of the test concentrations, and an EC50 of > 3000 mg/L was reported.
Thus, based on theabove mentioned results, and due to the structural and profile similarities of the substances, as are explained with in the overall endpoint summary 6.1 it can be concluded that no toxicological short-term effects on aquatic invertebrates are expected up tothe limit ofwater solubility for 2-ethylhexyl laurate (CAS No. 20292-08-4).
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