Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)

Data source

Reference
Reference Type:
other: Prediction model
Title:
Bio-degradation in water by Environmental Science Center’s PBT profiler
Author:
Environmental Science Center
Year:
2010
Bibliographic source:
PBT profiler, Office of Chemical Safety and Pollution Prevention , U.S. Environmental Protection Agency; version 1.301

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: Modelling database
Principles of method if other than guideline:
PBT profiler database
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other: liquid
Details on test material:

-Substance Name: ethyl 4,4,4-trifluoroacetoacetate
-Molecular formula : C6H7F3O3
-Substance type: Organic
-physical state-liquid

Study design

Oxygen conditions:
other: estimated data
Duration of test (contact time):
38 d

Results and discussion

% Degradation
Parameter:
other: Halflife
Value:
50
Sampling time:
38 d
Remarks on result:
other: 38 days = 912 hrs
Details on results:
Half life = 38 days (912hrs)

Any other information on results incl. tables

Media

Half life

(days)

Percent in Medium

water

38

41%

Applicant's summary and conclusion

Interpretation of results:
readily biodegradable
Conclusions:
Ethyl 4,4,4-trifluoroacetoacetate is 50% biodegradable in water in 38 days (half-life). This value indicates that ethyl 4,4,4-trifluoroacetoacetate is readily biodegradable in water since the half life is less than the EPA criteria of >= 60 days (to qualify the chemical as persistent).
Executive summary:

Based on level III fugacity model the half life period ofethyl 4,4,4-trifluoroacetoacetatewas estimated.Ethyl 4,4,4-trifluoroacetoacetate is 50% biodegradable in water in 38 days (half-life). This value indicates that ethyl 4,4,4-trifluoroacetoacetate is readily biodegradable in water since the half life is less than the EPA criteria of >= 60 days (to qualify the chemical as persistent).