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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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP-study, no deviation.

Data source

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

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 A (Ready Biodegradability: DOC Die Away Test)
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Dimethyl 5-methylpyridine-2,3-dicarboxylate
EC Number:
601-161-5
Cas Number:
112110-16-4
Molecular formula:
C10 H11 N O4
IUPAC Name:
Dimethyl 5-methylpyridine-2,3-dicarboxylate
Details on test material:
- Name of test material (as cited in study report): "5-Methyl-2,3-pyridinedicarboxylate, dimethyl ester
- Analytical purity: 98.2 %
- Lot/batch No.: 6116H01GA
- Expiration date of the lot/batch: 26 April 2007

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, non-adapted
Details on inoculum:
- Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): Municipal activated sludge from laboratory wastewater treatment plant fed with municipal sewage and synthetic wastewater.
- Concentration of sludge: 30 mg/l
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
20 mg/L
Based on:
DOC
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
DOC removal
Reference substance
Reference substance:
aniline

Results and discussion

% Degradation
Parameter:
% degradation (DOC removal)
Value:
< 10
Sampling time:
28 d

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
under test conditions no biodegradation observed