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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
other: guideline study, validity criteria fulfilled;

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2002
Report date:
2002

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 310 (Ready Biodegradability - CO2 in Sealed Vessels (Headspace Test)
Principles of method if other than guideline:
ISO 14593 - CO2-Headspace Test
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
1-(1,1-dimethylethoxy)-2-methylpropane
EC Number:
251-347-1
EC Name:
1-(1,1-dimethylethoxy)-2-methylpropane
Cas Number:
33021-02-2
Molecular formula:
C8H18O
IUPAC Name:
1-(tert-butoxy)-2-methylpropane
Details on test material:
- Test substance: Isobutyl-tert-Butylether,
- purity: 86.4%
- physical form: liquid

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic (adaptation not specified)
Details on inoculum:
- inoculum: Activated sludge from a laboratory wastewater plant treating municipal sewage .
- Concentration of dry substance: 4 mg/I
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
27.4 mg/L
Based on:
test mat.
Reference substance
Reference substance:
aniline

Results and discussion

% Degradation
Parameter:
% degradation (CO2 evolution)
Value:
< 10
Sampling time:
28 d
Details on results:
Kinetic of test substance (in %):
ca. 5 after 7 day(s)
ca. 5 after 14 day(s)
ca. 4 after 21 day(s)
ca. 3 after 28 day(s)
Kinetic of control substance (in %):
ca. 80 ... 90 after 14 day(s)

Any other information on results incl. tables

Test substance: volatile, no DOC values were measured;

Applicant's summary and conclusion

Interpretation of results:
under test conditions no biodegradation observed