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Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: inherent biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Comparable to guideline study with acceptable restrictions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1982
Report date:
1982

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
N-methylformamide
EC Number:
204-624-6
EC Name:
N-methylformamide
Cas Number:
123-39-7
Molecular formula:
C2H5NO
IUPAC Name:
N-methylformamide
Details on test material:
Test substance: as prescribed by 1.1 - 1.4

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, industrial (adaptation not specified)
Duration of test (contact time):
7 d
Initial test substance concentration
Initial conc.:
400 mg/L
Based on:
DOC

Results and discussion

% Degradation
Parameter:
% degradation (DOC removal)
Value:
100
Sampling time:
7 d
Details on results:
Kinetic of test substance (in %):
= 4 after 3 hour(s)
= 6 after 1 day(s)
= 50 after 2 day(s)
= 98 after 3 day(s)

Applicant's summary and conclusion

Interpretation of results:
other: easily eliminated from water (mainly by biodegradation)

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