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EC number: 258-904-8
CAS number: 53988-10-6
The test item showed 43 % and 44.4 % respiration inhibition of activated sludge at the highest test item concentration of 10000 mg/L. An EC50 of >10000 mg/L were obtained in this test. The effect value relates to nominal concentration, since no analytical monitoring was performed.
In order to test the toxicity to microorganism of the substance,
activated sludge from predominantly domestic sewage plant was exposed to
the test solution of five nominal concentrations of the substance (1000,
1800, 3200, 5600 and 10000 mg/L), blank control solution and solution
with positive reference substance for a period of 3 hours. The
respiration rates were calculated. No physico-chemical oxygen
consumption was observed at the highest concentration of test substance.
The test item showed 43 % respiration inhibition of activated sludge at
the highest test item concentration of 10000 mg/L,and an EC50 of >10000
mg/L were obtained.. This toxicity study is classified as acceptable and
satisfies the guideline requirements for the toxicity study to
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