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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

EC50 for microorganisms:
870 mg/L
EC10 or NOEC for microorganisms:
77 mg/L

Additional information

The key study comes from a GLP guideline study following OECD TG 209 (2010). Domestic activated sludge was exposed to reaction product of 2,3-dinitrotoluene and 2,6-Dinitrotoluene and hydrogen for 3 h. The EC50 was 870 mg/L, the EC20 was 180 mg/L and the EC10 was 77 mg/L (BASF, 2012).

It can be concluded that the inhibition of the degradation activity of activated sludge is not anticipated when introduced in appropriately low concentrations.