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:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: Body responsible for the test

Data source

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

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
Version / remarks:
(May 1981)
Deviations:
not specified
Qualifier:
according to
Guideline:
other: DIN 38409 Dec. 1980
Deviations:
not specified
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Oxygen conditions:
not specified
Inoculum or test system:
not specified
Duration of test (contact time):
28 d
Initial test substance concentrationopen allclose all
Initial conc.:
10 mg/L
Based on:
test mat.
Initial conc.:
20 mg/L
Based on:
test mat.

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (CO2 evolution)
Value:
1
Sampling time:
28 d
Remarks on result:
other: for initial concentration of 20 mg/L
Parameter:
% degradation (CO2 evolution)
Value:
9
Sampling time:
28 d
Remarks on result:
other: for initial concentration of 10 mg/L

BOD5 / COD results

BOD5 / COD
Parameter:
COD
Value:
1.78 g O2/g test mat.

Any other information on results incl. tables

Detailed results

 Day  10 mg/L test substance [%]  20 mg/l test substance [%]  aniline [%]
 5  2  0  1
 9  2  0  51
 13  5  1  78
 16  5  1  82
 19  5  1  85
 22  7  1  86
 27  8  1  89
 28  9  1  93

- test substance is not biodegradable in this test

- in a dynamic bioelimination process (simulation test, aerobic sewage, coupled units test, OECD-guideline 303A, May 1981), the average elimination of the test substance was 83.8% of the initially measured concentration

- as the substance has been determined to be not biodegradable, the BOD was not determined in view of the other tests performed

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Interpretation of results:
other: not readily biodegradable
Conclusions:
The substance is not biodegradable in this test.