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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The inhibition of the degradation activity of activated sludge is not anticipated when introduced in appropriately low concentrations.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
1 000 mg/L

Additional information

The toxicity of propanoic acid, 2,2-dimethyl- (CAS 75-98-9) to microorganisms was investigated in a study conducted according to OECD 209 (Hexion, 2016).

The effect of the substance on the respiration of activated sewage sludge gave a 3-h EC50 of >1000 mg/L (nominal). The No Observed Effect Concentration (NOEC) after 3 hours exposure was 1000 mg/L.