Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Currently viewing:

Administrative data

Endpoint:
biodegradation in water: screening test, other
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1982
Report Date:
1982

Materials and methods

Test guideline
Qualifier:
no guideline available
Principles of method if other than guideline:
- Principle of test: Biochemical oxygen demand determined after 5 d at 20°C inoculation; COD via titration
- Parameters analysed / observed: oxygen content at 0 h and after 5 d inoculation
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
liquid
Details on test material:
Terasil Blau 219 Re fl.

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, industrial (adaptation not specified)
Duration of test (contact time):
5 d

Results and discussion

% Degradation
Parameter:
other: BOD5
Remarks on result:
other: BOD5 measurement

BOD5 / COD results

BOD5 / CODopen allclose all
Key result
Parameter:
BOD5
Value:
215 mg O2/g test mat.
Remarks on result:
other: Test material concentration: 20 mg/L
Parameter:
COD
Value:
678 mg O2/g test mat.

Applicant's summary and conclusion

Validity criteria fulfilled:
not applicable
Interpretation of results:
not readily biodegradable
Conclusions:
The ratio BOD5 / COD is 0.32 indicating no potential for ready biodegradation.