Registration Dossier

Diss Factsheets

Administrative data

Endpoint:
activated sludge respiration inhibition testing
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2007
Report date:
2007

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test
Version / remarks:
1984
GLP compliance:
yes

Test material

Constituent 1
Reference substance name:
Acid Navy RN-2682
IUPAC Name:
Acid Navy RN-2682
Test material form:
solid

Test solutions

Vehicle:
no

Test organisms

Test organisms (species):
activated sludge of a predominantly domestic sewage

Study design

Test type:
other: aerobic
Water media type:
freshwater
Limit test:
yes
Total exposure duration:
3 h

Test conditions

Test temperature:
20 °C
Dissolved oxygen:
at least 8.5 mg/l
Reference substance (positive control):
yes
Remarks:
3,5-dichlorophenol at concentrations of 5, 16, 50 mg/l

Results and discussion

Effect concentrationsopen allclose all
Duration:
3 h
Dose descriptor:
EC50
Effect conc.:
> 1 000 mg/L
Duration:
3 h
Dose descriptor:
NOEC
Effect conc.:
>= 1 000 mg/L
Details on results:
Test item had no significant inhibitory effect (< 15 %) on the respiration rate of activated sludge after the incubation of 3 hours in a limit test concentration of 1000 mg/l.
Results with reference substance (positive control):
EC50 (3h) = 14 mg/l

Applicant's summary and conclusion

Conclusions:
EC50 (3h) > 1000 mg/l

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