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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The 3-h EC50 and 3-h EC10 values are > 1000 mg/L as observed in a respiration inhibition study with activated sludge of a predominantly domestic sewage.

Key value for chemical safety assessment

Additional information

The toxicity of the substance to microorganisms was investigated in an activated sludge respiration inhibition study according to OECD guideline 209 and in compliance with GLP criteria (BASF SE, 2015). In this study non-adapted activated sludge from a predominantly domestic sewage was exposed to nominal test substance concentrations of 0 (control), 62.5, 125, 250, 500, and 1000 mg/L for 3 hours. Test concentrations were not analytically verified. The effects on microorganisms were determined by measuring total respiration rates and comparing these to an unexposed control. No inhibition of respiration rates was observed at concentrations up to 1000 mg/L. Based on these findings, the 3-h EC50 and EC10 values are determined at >1000 mg/L.