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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:
other: Guideline- and GLP-Study with no or minor deficiencies.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1994

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
5-amino-3-(morpholin-4-yl)-1,2,3-oxadiazolidin-3-ium chloride
EC Number:
605-254-1
Cas Number:
16142-27-1
Molecular formula:
C6 H11 N4 O2 . Cl
IUPAC Name:
5-amino-3-(morpholin-4-yl)-1,2,3-oxadiazolidin-3-ium chloride

Test organisms

Test organisms (species):
activated sludge of a predominantly domestic sewage
Details on inoculum:
Activated sludge, not adapted, from the STP Hildesheim. After precipitation the sludge was washed twice with dechlorinated and autoclaved tap water.

Study design

Test type:
static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
3 h

Test conditions

Test temperature:
20°C
pH:
7.15
Reference substance (positive control):
yes
Remarks:
copper(II)sulfate pentahydrate

Results and discussion

Effect concentrations
Duration:
3 h
Dose descriptor:
EC50
Effect conc.:
> 1 000 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
inhibition of total respiration
Remarks:
respiration rate

Applicant's summary and conclusion

Validity criteria fulfilled:
yes