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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 appropriate low concentrations.

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Additional information

To assess the toxicity of TMAEE (CAS 93240-93-8) towards microorganisms, a short-term respiration test according to OECD 209 was conducted under GLP. As inoculum, activated sludge from a domestic wastewater treatment plant was used. The exposure period was 180 minutes. An 180-min EC10 of 340 mg/L was obtained for the inhibition of oxygen consumption, based on nominal test item concentrations (BASF SE, 2020; report no.: 08G0034/19G051). The 180-min EC20 and EC50 values were above the highest test concentration of 1000 mg/L.

Based on the experimental data for TMAEE, it can be concluded that the inhibition of the degradation activity of activated sludge is not anticipated when TMAEE (CAS 9324093-8) is introduced in appropriately low concentrations.