Registration Dossier

Administrative data

Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
8 - 9 Feb 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report Date:
2018

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
Version / remarks:
April 13, 2004
GLP compliance:
yes
Type of method:
HPLC method
Partition coefficient type:
octanol-water

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Partition coefficient
Key result
Type:
log Pow
Partition coefficient:
> 6.5
Temp.:
25 °C
Remarks on result:
other: pH was not measured.

Any other information on results incl. tables

Preliminary results

The estimated values of log Pow for the test item with the partition coefficient calculation software [ClogP v4.0 (BioByte Corp.) and Kowwin v1.68 (U.S. Environmental Protection Agency)] were 6.60 and 5.60, respectively.

 

Measurement results

 

Name

tR

k

log k

log Pow

Reference items

Thiourea

0.89

t0 = 0.89

0.89

Isopropylbenzene

3.68

3.135

0.496

3.7

3.68

3.135

0.496

3.7

1,2,4-Trichlorobenzene

4.62

4.191

0.622

4.2

4.62

4.191

0.622

4.2

n-Buthylbenzene

6.02

5.764

0.761

4.6

6.02

5.764

0.761

4.6

Fluoranthene

8.77

8.854

0.947

5.1

8.77

8.854

0.947

5.1

Triphenylamine

11.83

12.292

1.090

5.7

11.84

12.303

1.090

5.7

DDT

15.00

15.854

1.200

6.5

15.00

15.854

1.200

6.5

Test item

19.78

-

-

>6.5

19.78

-

-

>6.5

Average:

>6.5

 

Calibration curve for partition coefficient by HPLC method:

log Pow = 3.688 * log k + 1.822

r = 0.987

 

Results and discussion

log Pow of test item > 6.5 at 25 °C

The log Pow of test item was not calculated using the regression equation of regression line and it was regarded as larger than 6.5 because the retention time of test item was larger than that of DDT (log Pow = 6.5).

Applicant's summary and conclusion