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EC number: 268-074-9
CAS number: 68002-61-9
Details on results:
the activated sludge, inhibition
at various concentrations of
3,5-dichlorophenol after 3 hours
pH at start
Temperature at end test
* = corresponding control and reference
activated sludge, inhibition percentages,
temperature at various
concentrations of test substance after 3hours
Temperature end test
stock solution quaternary ammonium compounds, (C16-18 and C18-unsatd.
alkyl) trimethyl, chlorides = 1 g/L
stock solution ofquaternaryammoniumcompounds,(C16-18andC18-unsatd.alkyl)trimethyl,
study was conducted to determine the toxicity of the test substance,
C16-18 and C18-unsatd. TMAC (96.9% active), to the microorganism
according to OECD Guideline 209, in compliance with GLP. The toxicity of
the test substance to activated sludge was determined at a contact time
of 3 h, using various concentrations ranging from 2.5 to 40 mg/L of the
test substance. No chemical analyses was conducted. The EC50 of the test
substance for activated sludge after 3 h contact time is 34 mg/L with
95% confidence limits of 9 and 86 mg/L. The EC10, EC20 and EC80 are 11,
16 and 73 mg/L, respectively. The validity of the test was shown by the
EC50 of the reference compound 3,5-dichlorophenol (15 mg/L), the
coefficient of variation of the replicates of the control oxygen uptake
rates (10%) and the average oxygen uptake rate for the control
replicates (30 mg O2/g dry weight/hour). Under the study conditions, the
test substance is therefore considered harmful to activated sludge with
an EC50 and EC10 values at 34 and 11 mg/L (nominal) respectively.
The test substance is considered harmful to activated sludge with an EC50 and EC10 values at 34 and 11 mg/L (nominal) respectively.
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