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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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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: see 'Remark'
Remarks:
The information of this endpoint has been provided by ECHA as a result of an inquiry, thus the full access to data in the report is not accessible to the registrant. However the reliability is estimated to be at level 1: Study conducted in accordance with generally accepted scientific principles. Possible deficiencies do not affect the quality of relevant results.

Data source

Reference
Reference Type:
other: Body responsible for the test
Title:
Unnamed
Year:
1993
Report date:
1993

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: Sturm. OCDE Guideline 301 B (1984) EEC Directive 84/449 (1984) - Annex V - Method C4-C (CO2 evolution)
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
-
EC Number:
413-110-2
EC Name:
-
Cas Number:
135861-56-2
Molecular formula:
C24H30O6
IUPAC Name:
1-[2,6-bis(3,4-dimethylphenyl)-hexahydro-[1,3]dioxino[5,4-d][1,3]dioxin-4-yl]ethane-1,2-diol
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder

Study design

Reference substance
Reference substance:
other: Sodium acetate

Results and discussion

% Degradation
Parameter:
% degradation (CO2 evolution)
Value:
28
Sampling time:
28 d
Details on results:
Points of degradation plot (test substance):
4 % degradation after 2 d
11 % degradation after 6 d
18 % degradation after 10 d
23 % degradation after 14 d
28 % degradation after 28 d

BOD5 / COD results

Results with reference substance:
Points of degradation plot (reference substance):
24 % degradation after 2 d
69 % degradation after 6 d
88 % degradation after 10 d
100 % degradation after 14 d

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Interpretation of results:
other: not readily biodegradable
Conclusions:
The test method is applicable for poorly soluble substances, but the test details are not available. As the test has been conducted under GLP and already assessed, it is considered as valid. There is no information available on the dispersing method, nor validity criteria. Based on the test result, the test substance is assessed as not readily biodegradable.
Executive summary:

The test substance was not readily biodegradable in an test based on respirometic CO2 evolution (C.4 -C) performed under CLP. This study is selected as key.