Registration Dossier
Registration Dossier
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EC number: - | CAS number: -
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The toxicity of 400160 to microorganisms was determined by performing an activated sludge respiration inhibition test according to OECD guideline 209 and EU method C.11 in a GLP certified testing facility.
The following results were determined:
3h NOEC = 1000 mg/L
3h EC50 > 1000 mg/L
3h EC20 > 1000 mg/L
Key value for chemical safety assessment
- EC10 or NOEC for microorganisms:
- 1 000 mg/L
Additional information
The study has been performed according to OECD guideline 209 and EU method C.11 in a GLP certified testing facility.
400160 was tested using seven concentrations ranging from 1 to 1000 mg/L. Duration of the test was 3 h. Activated sludge was used as inoculum. It was taken from a domestic sewage treatment plant and washed before usage. The dry matter was determined as 2.92 g suspended solids/L, giving a concentration of 1.46 g suspended solids/L in the test.
In the study no toxic effect could be observed. The oxygen uptake rate at a concentration of 1000 mg/L was similar as in the control.
3.5-Dichlorophenole was used as positive control. Four concentrations were tested. An EC50 of 8.0 mg/L was determined which was within the demanded range of 2 – 25 mg/L.
The following results for the test item 400160 were determined:
3
h NOEC = 1000 mg/L
3 h EC20 > 1000 mg/L
3 h EC50 > 1000 mg/L
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