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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
Study period:
04/02/1994 - 25/03/1994
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1994
Report date:
1994

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
Deviations:
no
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether
EC Number:
609-858-6
Cas Number:
406-78-0
Molecular formula:
C4H3F7O
IUPAC Name:
1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether
Test material form:
liquid

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, adapted
Details on inoculum:
Sludge was sampled from 10 locations.

Results and discussion

% Degradation
Key result
Parameter:
% degradation (O2 consumption)
Value:
2
Sampling time:
28 d

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
not readily biodegradable
Executive summary:

An OECD 301c study was performed to determine whether the test substance was readily biodegradable, by measuring oxygen consumption in adapted activated sludge. After 28 days, a mean value of 2% biodegradation had occurred, indicating that the test substance is not considered to be readily biodegradable.