Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: inherent biodegradability
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
3 (not reliable)
Rationale for reliability incl. deficiencies:
other: Documentation not sufficient for validation.

Data source

Referenceopen allclose all

Reference Type:
study report
Title:
Unnamed
Year:
1981
Report Date:
1981
Reference Type:
other company data
Title:
Unnamed
Year:
1997
Report Date:
1997

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, industrial, adapted
Duration of test (contact time):
11 d
Initial test substance concentration
Initial conc.:
115 mg/L
Based on:
DOC

Results and discussion

% Degradation
Value:
95
Sampling time:
11 d

Applicant's summary and conclusion

Conclusions:
The test item has been eliminated by > 95% within 11 days but it is not possible to make a conclusion about the rate of biodegradation.