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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

EC50 (3h) > 1000 mg/L (OECD 209; activated sludge)
NOEC >= 1000 mg/L (OECD 209; activated sludge)

Key value for chemical safety assessment

Additional information

One study is available on the toxicity of 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl 2-chloropropenoic acid ester (CAS 96383-55-0) to microorganisms. The study was conducted according to OECD guideline 209 and GLP (Desmares-Koopmans, 2013). The test was designed as a combined limit- and range finding study. The limit test loading 1000 mg/L was tested in triplicate. Additionally, single replicates of 10 and 100 mg/L loadings were tested, to be used for range finding, incase effects would occur. Activated sludge form a municipal sewage treatment plant, receiving predominantly domestic sewage, was exposed to the test substance for three hours, and the inhibition of respiration was analysed. The test showed no inhibition, 18% inhibition and an average of 5% inhibition of the respiration rate at a loading rates of 10, 100 and 1000 mg/L, respectively. The inhibition observed at a loading rate of 1000 mg/L was not statistically significant. Hence, the EC50 and NOEC can considered to be > 1000 mg/L and => 1000 mg/L, respectively.