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)
Rationale for reliability incl. deficiencies:
guideline study

Data source

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

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
Deviations:
no
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Reference substance name:
Grape, red, ext.
EC Number:
284-511-6
EC Name:
Grape, red, ext.
Cas Number:
84929-27-1
IUPAC Name:
Palmitoyl grapevine shoot extract
Test material form:
solid

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, adapted
Remarks:
(concentration in the test 25.0 mg dry matter/L)
Duration of test (contact time):
ca. 28 d

Results and discussion

% Degradationopen allclose all
Key result
Parameter:
% degradation (CO2 evolution)
Value:
ca. 11
Sampling time:
28 d
Remarks on result:
other: not readily biodegradable as the criterion of reaching 60% of degradation is not met
Key result
Parameter:
% degradation (CO2 evolution)
Value:
ca. 68
Sampling time:
8 d
Remarks on result:
other: As expected the positive control is readily biodegradable

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
not readily biodegradable
Conclusions:
For the test item Palmitoyl grapevine shoot extract only 11% biodegradation was observed after 28 days. The 10-day window could not be determined. The criterion of reaching 60% of degradation is not met. Therefore Palmitoyl grapevine shoot extract is considered as not readily biodegradable.