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Diss Factsheets

Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
5.9. 2001-22.10. 2001
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2001
Report date:
2001

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 E (Ready biodegradability: Modified OECD Screening Test)
Deviations:
no
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
(S)-pyrrolidine-2-carboxamide
EC Number:
231-397-0
EC Name:
(S)-pyrrolidine-2-carboxamide
Cas Number:
7531-52-4
Molecular formula:
C5H10N2O
IUPAC Name:
(S)-pyrrolidine-2-carboxamide

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
other: wastewater from output of biological clarification plant
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
40.6 mg/L
Based on:
DOC
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
DOC removal
Reference substance
Reference substance:
benzoic acid, sodium salt

Results and discussion

% Degradation
Parameter:
% degradation (DOC removal)
Value:
100
Sampling time:
28 d
Details on results:
Degradation kinetics:
Day 3: 13.4%
Day 7: 92.6%
Day 28: 100%

BOD5 / COD results

Results with reference substance:
96.8% after 3 days

Applicant's summary and conclusion

Interpretation of results:
readily biodegradable