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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

3-h EC10 = 18 mg/L (95% CL = 7.9 to 41.8 mg/L; OECD 209; domestic activated sludge; BASF SE, 2012; report no. 08G0454/11G167)

Key value for chemical safety assessment

EC50 for microorganisms:
89 mg/L
EC10 or NOEC for microorganisms:
18 mg/L

Additional information

In a short-term respiration inhibition test according to OECD 209 using activated sludge from a wwtp treating predominantly domestic sewage, the toxic effect of bis(2 -ethylhexyl)amine was studied. The 3 -h EC10 was determined to be 18 mg/L, while the 3 -h EC50 was 89 mg/L (BASF SE, 2012, report no. 08G0454/11G167).

In a short-term respiration inhibition test using activated sludge from a wwtp treating industrial wastewater, the EC20 was greater than 100 mg/L (BASF AG, 1983).

Additionally, in an oxygen consumption test using Pseudomonas putida (ROBRA test, Tween 80 was used as a solvent) an EC10 of 1307 mg/L was determined (BASF AG, 1989; report no. 10/1890500).

It can be concluded, that the inhibition of the degradation activity of activated sludge is not anticipated after adaptation.