Phosphonium, tetrabutyl-, (hydrogen difluoride) (1:1)

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)

Rationale for reliability incl. deficiencies:

other: GLP guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2006

Report date:

2006

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method C.4-D (Determination of the "Ready" Biodegradability - Manometric Respirometry Test)

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

-

EC Number:

471-140-1

EC Name:

-

Cas Number:

121240-56-0

Molecular formula:

C16H37F2P

IUPAC Name:

hydrogen tetrabutylphosphanium difluoride

Study design

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge, domestic (adaptation not specified)

Duration of test (contact time):

28 d

Initial test substance concentration

Initial conc.:

100 mg/L

Parameter followed for biodegradation estimation

Parameter followed for biodegradation estimation:

O2 consumption

Reference substance

Reference substance:

benzoic acid, sodium salt

Results and discussion

% Degradation

Parameter:

% degradation (O2 consumption)

Value:

0

Sampling time:

28 d

Details on results:

Points of degradation plot (test substance):
0 % degradation after 7 d
0 % degradation after 14 d
0 % degradation after 21 d
0 % degradation after 28 d

BOD5 / COD results

Results with reference substance:

Points of degradation plot (reference substance):
80 % degradation after 7 d
86 % degradation after 14 d
90 % degradation after 21 d
92 % degradation after 28 d

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Interpretation of results:

under test conditions no biodegradation observed