Registration Dossier
Registration Dossier
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EC number: 447-060-8 | CAS number: -
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
DV6850 was considered to have had no effect on the respiration rate of activated sludge at any of the concentrations employed in the test. The EC20, EC50 and EC80 of the test substance could not, therefore, be calculated but these must be greater than 100 mg/L, the highest level tested.
Key value for chemical safety assessment
Additional information
The effect of DV6850 on the respiration rate of activated sludge was assessed by the methods detailed in EU methods C.11 and OECD Test Guideline 209.
Samples of activated sludge (suspended solids 1.6 g/L), fed with synthetic sewage, were exposed to the test substance at nominal concentrations of 1, 10 and 100 mg/L for three hours. Their rates of oxygen consumption were determined and compared with those of controls, containing activated sludge and synthetic sewage alone, which were established at the beginning and end of the culture series.
DV6850 was considered to have had no inhibitory effect on the respiration rate of activated sludge at any of the concentrations employed in the test. The EC20, EC50 and EC80, of the test substance could not, therefore, be calculated but these must be greater than 100 mg/L, the highest level tested.
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