Registration Dossier

Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Administrative data

Endpoint:
biodegradation in water: simulation testing on ultimate degradation in surface water
Type of information:
experimental study
Adequacy of study:
key study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013
Report Date:
2013

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 309 (Aerobic Mineralisation in Surface Water - Simulation Biodegradation Test)
Deviations:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other:
Radiolabelling:
yes

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
natural water / sediment
Duration of test (contact time):
56 d
Initial test substance concentrationopen allclose all
Initial conc.:
10 µg/L
Based on:
test mat.
Initial conc.:
50 µg/L
Based on:
test mat.

Results and discussion

% Degradation
Key result
% Degr.:
> 32 - < 35
Parameter:
radiochem. meas.
Sampling time:
56 d
Remarks on result:
other:
Half-life of parent compound / 50% disappearance time (DT50)open allclose all
Key result
Compartment:
sediment
DT50:
0.9 d
Type:
(pseudo-)first order (= half-life)
Temp.:
20 °C
Remarks on result:
other:
Key result
Compartment:
sediment
DT50:
0.8 d
Type:
(pseudo-)first order (= half-life)
Temp.:
20 °C
Remarks on result:
other:

Applicant's summary and conclusion

Validity criteria fulfilled:
yes