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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

EC50 = 100 mg/l

Key value for chemical safety assessment

EC50 for microorganisms:
100 mg/L

Additional information

Some studies on the substance are available to assess the toxicity of the substance to microorganisms, but each of them presents some lacking: in two of them a water solution with 20 % of the substance was tested and for the other just the summary is available.

The SefePharma Laboratories Ltd. study (1993) can be considered as the most reliable, since even if the tested substance concentration is low, the test was performed at 1000 mg/l, with no inhibitory effect. This set the result at > 200 mg/l, calculated on the substance effective concentration.

For completeness sake, a further study, a reliable test performed on the similar substance CAS 16470-24-9, was reported. Detailed justification for Read Across is reported within the end point and in the Category Justification Report attached to the section 13.

All of those studies demonstrate that the substance does not inhibit the degradation activity of activated sludge in concentrations higher or equal to 100 mg/l.