Registration Dossier
Registration Dossier
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EC number: 241-769-4 | CAS number: 17791-81-0
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
EC10 >1000 mg/L, EC20 >1000 mg/L, EC50 >1000 mg/L, EC80 >1000 mg/L were found in an activated sludge respiration inhibition test with 3 hour residence time for the test substance.
Key value for chemical safety assessment
- EC50 for microorganisms:
- 1 000 mg/L
- EC10 or NOEC for microorganisms:
- 1 000 mg/L
Additional information
An activated sludge respiration inhibition test with the test substance was conducted according to OECD guideline 209. The test substance was added in the required amounts according to the test concentrations (62.5, 125, 250, 500 and 1000 mg/L) directly to the test vessels with deionized water. Subsequently synthetic medium were dosed to each test vessel with the test substance. After addition of inoculum suspension (3 g/L dry weight) the incubation was started by aeration of the test vessels with pressured air. The oxygen uptake of each test concentration, the reference substance and the blank control was measured after 3 hours of exposure for a period of about 8 to 10 minutes or until the oxygen concentration fell below 2 mg/L.
An EC10 >1000 mg/L, EC20 >1000 mg/L, EC50 >1000 mg/L, EC80 >1000 mg/L were found in the activated sludge respiration inhibition test with 3 hour residence time for the test substance.
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