Registration Dossier

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: The test was conducted according to EU Method C.5 and compliant with GLP.

Data source

Reference
Reference Type:
other: Body responsible for the test
Title:
Unnamed
Year:
1993

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: Method C5 of 84/449/EEC OECD Guideline 301B, Modified Sturm Test
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, non-adapted
Duration of test (contact time):
73 d
Reference substance
Reference substance:
other: sodium benzoate

Results and discussion

% Degradation
Parameter:
% degradation (CO2 evolution)
Value:
31
Sampling time:
28 d
Details on results:
Points of degradation plot (test substance):
4% degradation after 6 d
14% degradation after 14 d
31% degradation after 28 d
44% degradation after 42 d
58% degradation after 56 d
80% degradation after 73 d

BOD5 / COD results

Results with reference substance:
Points of degradation plot (reference substance):
58% degradation after 6 d
78% degradation after 14 d
85% degradation after 28 d
86% degradation after 42 d
86% degradation after 56 d
89% degradation after 73 d

Applicant's summary and conclusion

Interpretation of results:
other: not readily biodegradable