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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

EC50 for microorganisms:
2 000 mg/L

Additional information

The only available study concerning toxicity to microorganisms was performed by Hoechst AG (1980) and is cited in the ECB IUCLID for CAS 126-30-7 (2000). The test was conducted according to ETAD fermentation tube method and used domestic activated sludge as inoculum. After 24 hours a toxic threshold concentration of 2000 mg/L was estimated. For regulatory purpose the toxic threshold concentration is put on level with the EC50.