Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Adequacy of study:
other information

Data source

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

Materials and methods

Test guideline
Qualifier:
according to guideline
Principles of method if other than guideline:
- Organization for Economic Co-operation and Development
(OECD), OECD guidelines for Testing of Chemicals, Section 3,
Degradation and Accumulation, guideline No. 301 B: "Ready
Biodegradability: CO2 Evolution Test" adopted July 17, 1992.


- European Community, Commission directive 92/69/EEC, Part
C: Methods for the determination of ecotoxicity, EC
Publication No. L383, December 1992, C.4. "Biodegradation:
determination of the 'ready' biodegradability, C.4-C: Carbon
dioxide (CO2) evolution test (Modified Sturm Test).


- ISO Standard 9439 (Water Quality - Evaluation of ultimate
aerobic biodegradability of organic compounds in aqueous
medium - carbon dioxide evolution test (1999).
GLP compliance:
yes

Study design

Reference substance
Reference substance:
other: Sodium acetate

Results and discussion

% Degradation
Value:
5
Sampling time:
28 d
Details on results:
Points of degradation plot (test substance):
1 % degradation after 2 d
1 % degradation after 5 d
1 % degradation after 7 d
2 % degradation after 9 d
3 % degradation after 14 d
3 % degradation after 19 d
4 % degradation after 23 d
4 % degradation after 27 d
5 % degradation after 29 d

BOD5 / COD results

Results with reference substance:
Points of degradation plot (reference substance):
12 % degradation after 2 d
40 % degradation after 5 d
52 % degradation after 7 d
60 % degradation after 9 d
70 % degradation after 14 d
70 % degradation after 19 d
70 % degradation after 23 d
71 % degradation after 27 d
75 % degradation after 29 d

Applicant's summary and conclusion

Interpretation of results:
other: not readily biodegradable