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EC number: 453-230-2 | CAS number: -
The influence of the test item on the activity of activated sludge was evaluated by measuring the respiratory rate under defined conditions (OECD Guideline 209) . The respiration rate (oxygen consumption) of an aerobic activated sludge fed with a standard amount of synthetic sewage was measured in the presence of various concentrations of the test item after an incubation period of 3 hours. Based on measured inibition rates, the 3 -hour EC20 and EC50 could not be quantified because up to the highest nominal test concentration of 1000 mg/L less than 20% inhibition was noted after three hours incubation. Nevertheless the 3 -hour EC20 and EC50 are clearly higher than 1000 mg/L under the reported conditions.The positive and the inocculum control worked as expected.
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