4,4,5,5,6,6,7,7,8,8,9,9,9-tridecafluorononyl methacrylate

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)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2007

Report date:

2007

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))

Deviations:

yes

Remarks:

The difference of extremes of replicate values of the percentage biodegradation of the test item was 37 % and was over the value of criterion (<20 %)

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl methacrylate

EC Number:

218-407-9

EC Name:

3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl methacrylate

Cas Number:

2144-53-8

Molecular formula:

C12H9F13O2

IUPAC Name:

3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl methacrylate

Details on test material:

- Purity: >99 %

Study design

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge, non-adapted

Duration of test (contact time):

0 - 28 d

Initial test substance concentration

Initial conc.:

100 mg/L

Based on:

test mat.

Results and discussion

% Degradation

% Degradation 1

Parameter:

% degradation (O2 consumption)

Value:

2

Sampling time:

28 d

Remarks on result:

other: average determined by biological oxygen demand

% Degradation 2

Parameter:

% degradation (test mat. analysis)

Value:

15

Sampling time:

28 d

Remarks on result:

other: average determined by gas chromatography

Details on results:

BOD analysis, replicate results: -4%, 5% and 6% degradation
GC test material analysis results: -2%, 11% and 35% degradation

Any other information on results incl. tables

Some of the test item was converted into methacrylic acid and 3,3,4,4,5,5,6,6,7,7,8,8,8- tridecafluorooctan-l-ol under the test conditions of this study. Methacrylic acid seemed to be biodegraded by microorganisms except one transferred to the CO2 absorbent, whereas the rest of the test item and 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafiuorooctan-l-ol were not biodegraded by microorganisms and remained.

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Interpretation of results:

other: not readily biodegradable

Conclusions:

not readily biodegradable

Executive summary:

A 28 day biodegradation by microorganisms study was conducted on the test substance. Degradation was determined by BOD (oxygen consumption measuring apparatus) and by test substance analysis (gas chromatography, GC). The average values for percent degradation were 2% and 14% for BOD and GC, respectively. These values did not pass the 10-day or 14-day window, therefore the test substance is not readily biodegradable.