Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Biodegradation in water: screening tests

Currently viewing:

Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
Deviations:
no
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
2-ethylcyclopentane-1,3-dione
EC Number:
212-512-3
EC Name:
2-ethylcyclopentane-1,3-dione
Cas Number:
823-36-9
Molecular formula:
C7H10O2
IUPAC Name:
2-ethylcyclopentane-1,3-dione

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, non-adapted
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption
Details on study design:
Preparation of inoculum test culture:Before the test 300 ml stock culture was filtered through a filter with 0.2 mm pore size to remove the bigger insoluble particles and then the dry substance content of the filtrate was determined. The measured value was 5.2 g/L. For preparing the inoculum culture 161.5 ml mineral medium was added to 38.5 ml filtered stock culture. The calculated dry mass of inoculum culture was 1 g/L.Preparation of reference solution:For the reference solution 320.01 mg sodium acetate was diluted in 100 ml mineral medium.Preparation of test vessels:Following test vessels were prepared and analysed for the study:- Test item (in two replicates)- Blank control (in two replicates)- Reference solution (positive control)- Reference and test item solution (toxicity control)- Sterilized solution of test item (abiotic control)
Reference substance
Reference substance:
acetic acid, sodium salt

Results and discussion

% Degradation
Key result
Parameter:
% degradation (O2 consumption)
Value:
83
Sampling time:
28 d
Remarks on result:
other: mean of two replicates
Details on results:
The biodegradability of the test item on day 18th was 69%.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
readily biodegradable
Conclusions:
The biodegradability of Ethyl-cyclopentanedione was investigated in Ready Biodegradability – Manometric respirometry test (according to OECD 301 F guideline). According to the OECD 301 guideline Ethyl-cyclopentanedione is ready biodegradable.