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Diss Factsheets

Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Description of key information

The effect of the test material on the respiration of activated sewage sludge gave an EC50 of 300 mg/L, and the inhibition of the degradation activity of activated sludge is not anticipated. 

Key value for chemical safety assessment

EC50 for microorganisms:
300 mg/L

Additional information

 A study was performed to assess the effect of the test material on the respiration of activated sewage sludge following OECD Guidelines No. 209. The effect of the test material on the respiration of activated sewage sludge gave an EC50 of 300 mg/L. The reference material gave an EC50 value of 10.8 mg/L. The activated sludge respiration test passed the quality control criteria for an acceptable test. The two control replicates produced oxygen consumption rates within the required 15% of each other, at 29.3 and 28 mg O2/L*hr.