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EC number: 217-568-2
CAS number: 1889-67-4
The purpose of the 3-hour test was to
evaluate the influence of the
1,1'-(1,1,2,2-tetramethylethylene)dibenzene on the activity of activated
sludge by measuring the respiration rate under defined conditions
according to OECD 209, Regulation (EC) No. 440/2008 Method C.11, EPA
OPPTS 850.6800. The respiration rates (total, heterotrophic and
nitrification oxygen uptake rates) of samples of activated sludge fed
with synthetic sewage were measured in an enclosed cell containing an
oxygen electrode after a contact time of 3 hours. The test item was
investigated at one (limit) concentration level of 1000 mg/L. The
observed oxygen consumption rates consequently the specific respiration
rates were in the range of the blank controls, no inhibitory effect of
the test item was observed. Based on measured oxygen consumption values
and calculated specific respiration rates it can be stated that the
3-hour EC10 and EC50 values of the test item are higher than 1000 mg/L.
Based on the statistical evaluation in this test the NOEC was ≥ 1000
Under the conditions of the performed
Activated Sludge Respiration Inhibition Test, the EC10 and EC50 values
of test item were determined to be higher than 1000 mg/L. Based on the
statistical evaluation in this test the NOEC was ≥1000 mg/L.
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