benzyl(diethylamino)diphenylphosphonium 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxyphenyl)propan-2-yl]phenolate

Biodegradation in water: screening tests

Administrative data

Endpoint:

biodegradation in water: ready biodegradability

Type of information:

migrated information: read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Study period:

January 24 - February 21, 1990

Reliability:

1 (reliable without restriction)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1990

Report date:

1990

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

82857-68-9

Cas Number:

82857-68-9

IUPAC Name:

82857-68-9

Test material form:

solid: particulate/powder

Remarks:

migrated information: powder

Details on test material:

Lable: GM 102 E
Batch no. 8724
Description: white powder
Container: plastic bag

Study design

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge (adaptation not specified)

Details on inoculum:

The effluent was kept under aerobic conditions in the period between sampling and application. To prepare the inoculum the sample was filtered through a coarse filter, the first 200 mL being discarded. The rest of the filtrate was kept aerobic until used. The inoculum was used on the day of collection. The number of bacteria, determined by means of Dip-slide was 10^4 bacteria/mL:

Duration of test (contact time):

28 d

Results and discussion

Details on results:

The biodegradability at 28 days was 15.7%.

BOD5 / COD results

BOD5 / COD

Parameter:

COD

Value:

2.518 mg O2/g test mat.

Any other information on results incl. tables

The COD of GM 102 E was 2.518 mg O2/mg (average value).

The ThOD (Theoric Oxygen Demand) of GM 102 E was 2.506 mg O2/mg.

The BOD of GM 102 E at days 5, 15 and 28 was respectively:

- 0.110 mg O2/mg

- 0.300 mg O2/mg

- 0.395 mg O2/mg

The biodegradability of GM 102 E at days 5, 15 and 28 was respectively: 4.4, 11.9 and 15.7%

The biodegradability of the reference substance was more than 60% at 28 days.

The depletion of dissolved oxygen in the two series of bottles containing 2 mg/L of sodium acetate plus 2 mg/L of GM 102 E is higher than the reference substance (sodium acetate) bottles.

Applicant's summary and conclusion

Interpretation of results:

not inherently biodegradable

Conclusions:

The COD average value was 2.518 mg O2/mg.
THe BOD values at 5, 15 and 28 days were 0.110, 0.300 and 0.395 mg O2/mg, respectively.
On the basis of the biodegradability values found that were 4.4, 11.9 and 15.7% respectively at 5, 15 and 28 days we can conclude that in the conditions adopted in this study the test article GM 102 E showed a little biodegradation and did not display inhibitory effects.