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EC number: 453-230-2
CAS number: 406679-89-8
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
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