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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Remarks:
USE OF (ROBUST) STUDY SUMMARIES PROVIDED BY ECHA, the study data of the Robust Study Summaries are older than 12 years
Type of information:
experimental study
Adequacy of study:
key study
Study period:
no further data available
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
other: USE OF (ROBUST) STUDY SUMMARIES PROVIDED BY ECHA, the study data of the Robust Study Summaries are older than 12 years
Title:
Unnamed
Year:
1991

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
Version / remarks:
Modified Sturm test
Deviations:
not specified
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
2-isopropyl-2-(1-methylbutyl)-1,3-dimethoxypropane
EC Number:
406-970-5
EC Name:
2-isopropyl-2-(1-methylbutyl)-1,3-dimethoxypropane
Cas Number:
129228-11-1
Molecular formula:
C13H28O2
IUPAC Name:
1-methoxy-2-(methoxymethyl)-5-methyl-2-(propan-2-yl)hexane
Test material form:
liquid
Specific details on test material used for the study:
no further data available

Study design

Oxygen conditions:
not specified
Inoculum or test system:
not specified
Details on inoculum:
no further data available
Duration of test (contact time):
28 d
Initial test substance concentrationopen allclose all
Initial conc.:
10 mg/L
Based on:
test mat.
Initial conc.:
20 mg/L
Based on:
test mat.
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
CO2 evolution
Details on study design:
no further data available
Reference substance
Reference substance:
benzoic acid, sodium salt

Results and discussion

% Degradationopen allclose all
Key result
Parameter:
% degradation (CO2 evolution)
Value:
0.1
Sampling time:
2 d
Key result
Parameter:
% degradation (CO2 evolution)
Value:
0.1
Sampling time:
5 d
Key result
Parameter:
% degradation (CO2 evolution)
Value:
0.1
Sampling time:
7 d
Key result
Parameter:
% degradation (CO2 evolution)
Value:
2.5
Sampling time:
9 d
Key result
Parameter:
% degradation (CO2 evolution)
Value:
6.6
Sampling time:
12 d
Key result
Parameter:
% degradation (CO2 evolution)
Value:
6.9
Sampling time:
21 d
Key result
Parameter:
% degradation (CO2 evolution)
Value:
10.1
Sampling time:
28 d

BOD5 / COD results

Results with reference substance:
day %
2 8.0
5 18.7
7 35.8
9 40.0
12 70.0
21 88.7
28 89.5

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Interpretation of results:
not readily biodegradable
Conclusions:
The substance is not readily biodegradable under test condition according to CO2 - Evolution Test