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Toxicity to microorganisms

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Description of key information

The inhibiting effect of the test item on the total respiration of activated sludge was observed with five concentrations (100, 200, 400, 800 and 1600 mg/L).

There was no clear dose-response relation of the test item concentration and the inhibition of the consumption rate within the concentration range of 100 to 1600 mg/L. This is probably due to substance specific properties such as poor water solubility and a sticky consistency.

An EC50 could therefore not be determined with the inhibition results of this test.

The EC50 of the test substance was above 100 mg/l.

The NOEC was below 100 mg/l

Key value for chemical safety assessment

Additional information