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:
key study
Study period:
2002
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2002
Report Date:
2002

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
Remarks:
migrated information: powder
Details on test material:
- Name of test material (as cited in study report): AR-FD 26 ( phase X )
- Physical state: powder
- Lot/batch No.: 01010

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
other: Factor X (used in the DBO5) prepared in the laboratory
Duration of test (contact time):
28 d
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption
Details on study design:
Temperature: 20° - 25° C
It is carried out in the darkness or under diffuse light.
Aeration or shaking, in order to ensure that the concentration of dissolved Oxygen is not less than 1 mg/L
Regulated pH of 6.5- 8.0 with NaOH (40 g/l) or H2S04 (50 g/l) if necessary
Carry out measurements of DQO (1, 7, 14, 21 and 28 day)

Results and discussion

% Degradation
Parameter:
% degradation (O2 consumption)
Value:
74

Any other information on results incl. tables

               Days of measurement of DQO
   Initial   7 days  14 days  21 days  28 days
 White  5.0  7.0  13  6.0  4.0
 Standard  693  640  458  448  399
 DQO(mg/l O2)  134  54  67  32  37

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Interpretation of results:
other: Biodegradable Product
Conclusions:
AR-DF 26 Phase X is biodegradable (74%)