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EC number: 202-347-5
CAS number: 94-60-0
A 3-hour activated sludge respiration inhibition test (OECD 209) was
performed using activated sludge from a domestic wastewater treatment
plant. The sludge microorganisms were exposed to five concentrations of
trans-DMCD. The respiration rate, expressed as oxygen consumption by
the microbes in mg O2 per liter per hour, was measured under defined
conditions following the 3-hour exposure period. Inhibition values were
calculated by comparing test respiration rates to negative control
rates. A graph of percent inhibition versus concentration was plotted.
An NOEC value of 1000 mg/L, the highest dose tested, was obtained for
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