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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

EC10 (3h) > 1000 mg/L (nominal) for activated sludge (OECD 209, read across)

Key value for chemical safety assessment

Additional information

Since no study assessing the toxicity of Fatty acids, C8 -10, octyl esters (CAS 91031-98-0) to aquatic microorganisms is available, in accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5 Grouping of substances, a read-across to the main component octyl octanoate (CAS 2306-88-9) was conducted. Further justification of the read-across approach is given within the endpoint summary 6.1 and the analogue justification document in section 13.

The key study was performed according to OECD Guideline 209 and GLP using activated sludge as inoculum (BASF, 2013). Activated sludge was exposed to the test substance in a static system for 3 hours, at nominal concentrations of 1000, 500, 250, 125 and 62.5 mg/L. No toxicity was observed at any of the concentrations tested. Thus, the 3h-EC10 value is determined to be > 1000 mg/L.

Based on the structural and profile similarities of target and the source substance, the assessment of microbial toxicity can also be considered valid for Fatty acids, C8 -10, octyl esters (CAS 91031-98-0).