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Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
other information
Study period:
21 July - 19 August 2009
Reliability:
1 (reliable without restriction)

Data source

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
Qualifier:
according to guideline
Guideline:
ISO DIS 9439 (Ultimate Aerobic Biodegradability - Method by Analysis of Released Carbon Dioxide)
Qualifier:
according to guideline
Guideline:
EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
GLP compliance:
yes

Test material

Constituent 1
Reference substance name:
846024-23-4
IUPAC Name:
846024-23-4
Details on test material:
Molecular formula C10H8Cl2N2O2
Molecular weight 259.09
CAS Number 846023-24-3
Description Ivory flakes (determined at NOTOX)
Batch 18238505
Purity 97.3%
Test substance storage: At room temperature in the dark

Study design

Duration of test (contact time):
ca. 28 d
Initial test substance concentration
Initial conc.:
ca. 12 other: mg
Based on:
other: TOC/l

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (CO2 evolution)
Value:
>= 1 - <= 5
Sampling time:
22 d
Parameter:
% degradation (CO2 evolution)
Value:
>= 3 - <= 15
Sampling time:
29 d

Applicant's summary and conclusion

Interpretation of results:
under test conditions no biodegradation observed
Conclusions:
WAY-186478 was not readily biodegradable under the conditions of the modified Sturm test presently performed