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:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report Date:
2017

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
GLP compliance:
yes

Test material

Reference
Name:
Unnamed

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, adapted
Details on inoculum:
Aniline was chosen as positive control.
Activated sludge was used as inoculum (concentration in the test 25.0 mg dry matter/L). The test was left running for 28 days.
All validity criteria were met. Degradation of the positive control was 69% after 9 days.
Duration of test (contact time):
ca. 28 d
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
inorg. C analysis

Results and discussion

% Degradationopen allclose all
Key result
Parameter:
% degradation (inorg. C analysis)
Value:
ca. 37
Sampling time:
10 d
Key result
Parameter:
% degradation (inorg. C analysis)
Value:
ca. 46
Sampling time:
28 d
Details on results:
The following data were determined for the test item Ginger, ext.:
10-day-window: day 6 – 16
degradation at the end of 10-day-window 37 %
degradation at the end of the test 46 %
pass level following guideline: 60 % at the end of 10-day-window for pure substances
respective 60 % at the end of the test for mixtures

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Remarks:
Degradation of the positive control was 69% after 9 days.
Interpretation of results:
not readily biodegradable
Conclusions:
Gingerext is considered as not readily biodegradable.