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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

EC10 (3 h) > 1000 mg/L for activated sludge microorganisms (OECD 209).

Key value for chemical safety assessment

Additional information

One GLP guideline study according to OECD 209 is available investigating the toxicity of isononanoic acid, C16-18 alkyl esters (CAS 111937-03-2) to microorganisms (Hammer, 2013). Activated sludge microorganisms were exposed to the test substance up to a nominal concentration of 1000 mg/L. No effects were observed based on the respiration rate after 3 h of incubation resulting in an EC10 (3 h) of > 1000 mg/L. An increase of respiration was recorded in all treatments compared to the control values. Based on this result it can be concluded that the test substance does not have any effects on microbial community in Sewage Treatment Plants and is not expected to inhibit the degradation process.