Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: screening test, other
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)

Data source

Reference
Reference Type:
other: Body responsible for the test
Title:
Unnamed
Year:
1996

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: 92/69/EEC, C4-E (Closed bottle test)
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Inoculum or test system:
other: not available
Reference substance
Reference substance:
other: Sodium benzoate

Results and discussion

% Degradation
Parameter:
% degradation (test mat. analysis)
Value:
ca. 8
Sampling time:
28 d
Details on results:
Points of degradation plot (test substance):
2 % degradation after 4 d
0 % degradation after 7 d
0 % degradation after 11 d
2 % degradation after 14 d
4 % degradation after 18 d
5 % degradation after 21 d
8 % degradation after 25 d
5 % degradation after 28 d

BOD5 / COD results

Results with reference substance:
Points of degradation plot (reference substance):
82 % degradation after 4 d
70 % degradation after 7 d
72 % degradation after 11 d
72 % degradation after 14 d
71 % degradation after 18 d
74 % degradation after 21 d
84 % degradation after 25 d
79 % degradation after 28 d

Applicant's summary and conclusion

Interpretation of results:
not readily biodegradable