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Toxicity to microorganisms

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Description of key information

Ethyl-(S)-propionate does not impair microbial respiration rates at concentrations up to the limit concentration of 1000 mg/L. The substance is not hazardous for activated sludge microorganisms.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
1 000 mg/L

Additional information

In an activated sludge respiration inhibition according to OECD test guideline 209 ethyl-(S)-hydroxypropionate did not impair the respiration rate of the test inoculum at concentrations up to 1000 mg/L. Therefore, ethyl-(S)-hydroxypropionate is not harmful to activated sludge microorganisms within the relevant range of test concentrations. No hazard to microorganisms associated with ethyl-(S)-propionate has been identified.