Registration Dossier
Registration Dossier
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EC number: 280-445-7 | CAS number: 83411-71-6
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
NOEC (3h) = 320 mg/l (nominal)
Key value for chemical safety assessment
- EC10 or NOEC for microorganisms:
- 320 mg/L
Additional information
The effect of the test item on the respiration of activated sewage sludge was assessed according to the OECD Guideline 209. Following a preliminary range-finding test activated sewage sludge was exposed to an aqueous dispersion of the test item at concentrations of 100, 320 and 1000 mg/l (five replicates for each concentration) for a period of 3 hours at a temperature of 20 ± 2 °C with the addition of a synthetic sewage as a respiratory substrate. The rate of respiration was determined after 3 hours contact time and compared to data for the control and a reference item, 3,5-dichlorophenol.
The No Observed Effect Concentration (NOEC) after 3 hours exposure was 320 mg/l.
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