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Long-term toxicity to aquatic invertebrates

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Description of key information

No long term toxic effects to aquatic invertebrates up to the limit of water solubility.

Key value for chemical safety assessment

Additional information

Since no studies investigating the long-term toxicity to aquatic invertebrates of fatty acids, C16-18, 2-hydroxyethyl ester, (CAS 97281-23-7) are available, a read across to another structurally related substance (CAS 853947-59-8) was conducted, in accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5.

The study was performed according to the OECD Guideline 211 under GLP conditions (Hertl, 2001). Daphnia magna was exposed to individually prepared Water Accommodated Fractions (WAF’s) of nominal 6.25, 12.5, 25, 50 and 100 mg/L test substance. The test was performed under semi-static conditions and the test solution was renewed on day 2, 5, 7, 9, 12, 14, 16, 19. According to analytical results, the measured concentrations were very low ranging between 0.02 and 0.06 mg/L. After 21 d, no particular signs of intoxication, no mortality and no effects on the mean reproduction rate were observed throughout the test, resulting in an NOELR >= 100 mg/L and a measured NOEC of >= 0.02 mg/L (arithm. mean).

Based on the results from the structurally related read-across substance (in accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5), which is characterized by a similar ecotoxicological profile, it can be concluded that the fatty acids, C16-18, 2-hydroxyethyl ester, (CAS 97281-23-7) will not exhibit chronic effects to aquatic invertebrates up to the limit of water solubility.