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Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Endpoint:
biodegradation in water: inherent biodegradability
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
1993
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
1993
Report Date:
1993

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge (adaptation not specified)
Duration of test (contact time):
28 d
Parameter followed for biodegradation estimationopen allclose all
Parameter followed for biodegradation estimation:
DOC removal
Parameter followed for biodegradation estimation:
other: colour removal

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (DOC removal)
Value:
< 10
Sampling time:
28 d
Parameter:
other: % colour removal
Value:
95
Sampling time:
28 d

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Interpretation of results:
not inherently biodegradable
Conclusions:
The substance was not found to be inherently biodegradable (DOC removal <10% after 28 d).