Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: screening tests
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1990
Report Date:
1990

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method C.9 (Biodegradation: Zahn-Wellens Test)
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
30 mg/L
Based on:
test mat.
Reference substance
Reference substance:
aniline

Results and discussion

% Degradationopen allclose all
Parameter:
not specified
Value:
ca. 2.4
Sampling time:
7 d
Parameter:
not specified
Value:
ca. 0.8
Sampling time:
10 d
Parameter:
not specified
Value:
ca. 0.8
Sampling time:
14 d
Parameter:
not specified
Value:
ca. 0
Sampling time:
21 d
Parameter:
not specified
Value:
ca. 0
Sampling time:
27 d
Details on results:
Experimental values (test substance)
2.4% biodegradation after 7d
0.8% biodegradation after 10d
0.8% biodegradation after 14d
0% biodegradation after 21d
0% biodegradation after 27d

BOD5 / COD results

BOD5 / CODopen allclose all
Parameter:
BOD5
Value:
0 g O2/g test mat.
Parameter:
COD
Value:
2.61 g O2/g test mat.
Parameter:
BOD5*100/COD
Value:
0
Results with reference substance:
Experimental values (reference substance)
61.7% biodegradation after 7d
72.7% biodegradation after 10d
73.9% biodegradation after 14d
73.5% biodegradation after 21d
73.1% biodegradation after 27d

Applicant's summary and conclusion

Conclusions:
The study confirms that the substance is not biodegradable.