Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP compliant study conducted according to OECD Guidelines, with no or minor deviations.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report Date:
2010

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
Qualifier:
according to
Guideline:
EU Method C.4-D (Determination of the "Ready" Biodegradability - Manometric Respirometry Test)
GLP compliance:
yes (incl. certificate)

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other: liquid
Details on test material:
Batch VE00095676
Purity 98.6%
Expiration date February 14, 2011

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, non-adapted
Duration of test (contact time):
33 d
Initial test substance concentration
Initial conc.:
ca. 20 mg/L
Based on:
test mat.

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (O2 consumption)
Value:
77
Sampling time:
28 d
Remarks on result:
other: in the test conditdions (22°C)
Parameter:
% degradation (O2 consumption)
Value:
78
Sampling time:
33 d
Remarks on result:
other: in the test conditdions (22°C)
Details on results:
The 10-day window criterion is also fulfilled (22% biodegradation on day 1 and 65% on day 11).
Decenal-4-trans did not inhibit the intrinsic respiration of inoculum at the test concentration and was therefore considered to be non toxic to the inoculum at the test concentration.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
readily biodegradable
Conclusions:
Thus, Decenal-4-trans should be regarded as readily biodegradable according to this test.