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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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:
2002
Report date:
2002

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
6,10-dimethylundecan-2-one
EC Number:
216-509-8
EC Name:
6,10-dimethylundecan-2-one
Cas Number:
1604-34-8
Molecular formula:
C13H26O
IUPAC Name:
6,10-dimethylundecan-2-one
Details on test material:
- Name of test material (as cited in study report): Tetrahydrogeranylaceton
- Lot/batch No.: B 633
- Analytical purity: 97.5%
water solubility: < 80 mg/L (Laboratory observation).

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, non-adapted
Details on inoculum:
Activated sludge from Iaboratory wastewater plant treating municipal sewage. Concentration of dry substance 30
mg/I.
Duration of test (contact time):
28 d
Initial test substance concentrationopen allclose all
Initial conc.:
26 mg/L
Based on:
test mat.
Initial conc.:
20 mg/L
Based on:
other: TOC
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
CO2 evolution
Details on study design:
TEST CONDITIONS
- Composition of medium: according to OECD 301
- Solubilising agent (type and concentration if used): no
- Test temperature: 22 +/- 2 °C
- pH: 7.3 - 7.5
- pH adjusted: yes
- Suspended solids concentration: 6 g/L dry matter
- Continuous darkness: yes

TEST SYSTEM
- Culturing apparatus:
- Number of culture flasks/concentration: 2
- Method used to create aerobic conditions: stirring
- Test performed in closed vessels due to significant volatility of test substance:
- Test performed in open system: yes
- Details of trap for CO2 and volatile organics if used:
- Other:

SAMPLING
- Sampling frequency: variable
- Sample storage before analysis: no

CONTROL AND BLANK SYSTEM
- Inoculum blank: 1
- Abiotic sterile control: 1
- Toxicity control: 1


STATISTICAL METHODS: not applicable
Reference substance
Reference substance:
aniline

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (CO2 evolution)
Value:
0 - 10
Sampling time:
3 d
Parameter:
% degradation (CO2 evolution)
Value:
10 - 20
Sampling time:
5 d
Parameter:
% degradation (CO2 evolution)
Value:
50 - 60
Sampling time:
17 d
Parameter:
% degradation (CO2 evolution)
Value:
70 - 80
Sampling time:
28 d

BOD5 / COD results

Results with reference substance:
Kinetic of control substance (in %):
day 3: 0 - 10 %
day 5: 10 - 20 %
day 14: 60 - 70 %
day 28: 90 %

Applicant's summary and conclusion

Interpretation of results:
other: CO2 of ThCO2; biodegradable, not readily biodegradable according to OECD criteria;