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
Study period:
20/10/2016 - 19/12/2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2016
Report Date:
2016

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
Deviations:
no
GLP compliance:
yes (incl. certificate)

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
liquid
Specific details on test material used for the study:
Test item was kept refrigerated in an airtight container, under a nitrogen atmosphere.

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
natural water
Duration of test (contact time):
ca. 28 d
Initial test substance concentration
Initial conc.:
ca. 9.07 mg/L
Reference substance
Reference substance:
benzoic acid, sodium salt

Results and discussion

% Degradationopen allclose all
Key result
Parameter:
% degradation (O2 consumption)
Value:
0
Sampling time:
28 d
Parameter:
% degradation (test mat. analysis)
Value:
4
Sampling time:
28 d

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
not readily biodegradable
Conclusions:
In the test suspensions after 28 days, the degradability based on the BOD was av. 0%, and the degradability based on the residual amount of the test substance was av. 4%. No peak attributed to transformation product was detected on the GC chromatogram. It is concluded that the test substance is not readily biodegradable.
Executive summary:

It is concluded that the test substance is not readily biodegradable and no transformation product is generated under the conditions of this test.