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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

EC50 (3h) > 1000 mg/l (nominal)
NOEC (3h): 1000 mg/l (nominal)

Key value for chemical safety assessment

EC50 for microorganisms:
1 000 mg/L
EC10 or NOEC for microorganisms:
1 000 mg/L

Additional information

A test to evaluate the toxicity of the test item to the activated sludge respiration activity was performed. In the range-finding test three different concentrations of test item, namely 10.0, 100.0 and 1000.0 mg/l, were tested. After 3 hours of incubation at 1000.0 mg/l concentration respiratory rate inhibition was equal to 9.2 %. On the basis of results obtained in the preliminary test, conservatively the definitive test was carried out at five concentrations of test item in a geometric series, namely 95.3, 171.5, 308.6, 555.6 and 1000.0 mg/l as test item. In the final test, after 3 hours of incubation respiration inhibition ranged from 1.2 % (in 171.5 mg/l solution) to 6.6 % (in 1000.0 mg/l solution).