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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 appropriate low concentrations.

Key value for chemical safety assessment

Additional information

In case of the toxicity to microorganisms, the assessment is based on the available experimental data. In a key study conducted according to ISO 8192 with domestic activated sludge the 30-min EC20 for the substance CAS 147-14-8 was determined to be ca. 750 mg/L (BASF AG, 1988). The 3-h EC50 was found to be higher than 10000 mg/L in the second study with activated sludge conducted according to OECD 209 (Huntington Ltd, 1988).

Based on the available experimental data, it can be concluded that inhibition of the degradation activity of activated sludge is not anticipated when CAS 147 -14 -8 is introduced in appropriately low concentrations.