Registration Dossier

Diss Factsheets

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:
9 Mar - 28 May 2009
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2009
Report date:
2009

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method C.4-E (Determination of the "Ready" Biodegradability - Closed Bottle Test)
Deviations:
no
Principles of method if other than guideline:
OECD method nr 301D
GLP compliance:
yes (incl. QA statement)
Remarks:
No. 1/2007/DPL

Test material

Constituent 1
Chemical structure
Reference substance name:
Reaction products of acetic acid and acetylferrocene and butan-1-ol and 2-methylpropan-1-ol and propan-1-ol and propan-2-ol
EC Number:
700-283-7
Molecular formula:
Exact molecular formula is not known as it is a reaction mass. Empiric formula: C5H5FeC5H4COCmHn
IUPAC Name:
Reaction products of acetic acid and acetylferrocene and butan-1-ol and 2-methylpropan-1-ol and propan-1-ol and propan-2-ol
Details on test material:
According to INQ-C-0000036278-61-01, INQ-C-0000036386-62-01, and INQ_RESULT_INQ-C-0000036417-65-01 from ECHA, identification of a substance has been changed to UVCB substance. Name of the substance on the study results is the old name (reaction mass of butan-1-ol and propan-2-ol, ReduxCo), however these reports should be regarded valid as all studies were performed on the substance that is being registered - ReduxCo.

Study design

Oxygen conditions:
aerobic
Remarks:
dark
Inoculum or test system:
activated sludge, non-adapted
Details on inoculum:
activated sludge, filtrate, from sewage treatment plant
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
2 mg/L
Based on:
ThOD/L
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption
Remarks:
ThOD
Reference substance
Reference substance:
acetic acid, sodium salt

Results and discussion

% Degradation
Parameter:
% degradation (O2 consumption)
Value:
46.12
Sampling time:
28 d
Details on results:
Basis on the results obtained for ReduxCo it was assessed that after 28 days of experiment biodegradation test material was equal to 46.12% and biodegradation of reference substance (sodium acetate) was equal to 62.56% after 7 days of the experiment and86.54% after 28 days of the experiment.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
inherently biodegradable
Conclusions:
According to study substance is not readily biodegradable as 28 days of experiment biodegradation test material was equal to 46.12% that is less than 60%. We can consider it as inherently biodegradable.
Executive summary:

ReduxCo is inherently biodegradable.