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Partition coefficient

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Reference
Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
Qualifier:
according to guideline
Guideline:
EU Method A.8 (Partition Coefficient - Shake Flask Method)
Qualifier:
according to guideline
Guideline:
EU Method A.8 (Partition Coefficient - HPLC Method)
Principles of method if other than guideline:
None
GLP compliance:
no
Type of method:
flask method
Partition coefficient type:
octanol-water
Specific details on test material used for the study:
Identification: FAT 41001/H TE
Appearance: Blue powder
Analytical method:
photometric method
Type:
log Pow
Partition coefficient:
-3.88
Temp.:
20 °C
Remarks on result:
other: pH not known
Details on results:
None

Individual Results

 

Preliminary Visual Estimation of the n-octanol solubility

 

Different amounts of the test item were stirred with different amounts of n-octanol at room temperature and visually checked for any undissolved particles.

Amount of test item in mg

Volume in mL

Total volume in ml

Stirring time

Appearance of mixture

100

10

10

60 min

undissolved

 

50

50

60 min

undissolved

10

10

10

50 min

undissolved

 

50

50

95 min

undissolved

 

100

100

95 min

undissolved

According to this preliminary test the solubility of the test item in n-octanol is below 100 mg/L (without correction of the purity).

Determination of the solubility in the n-Octanol phase: Flask Methods

Experiment

A

B

C

D (blank)

Amount of test item (mg)

100

100

100

--

Stirring time at 30°C (h)

24

48

72

72

Aliquot of the flasks (ml)

1

1

1

1

End volume (ml)

3

3

3

3

Measured concentration (µg/ml)

15.3

13.6

15.4

--

Solubility(mg/l)

45.8

40.7

46.2

--

The values of the measured concentrations of the test item in n-octanol is 44.2 mg/L.

Conclusions:
The partition coefficient n-octanol/water of the test item at 20 °C, from the individual solubilities in water and n-octanol, was determined to: log Pow = -3.88
Executive summary:

The purpose of the study was determination of the partition coefficient n-octanol / water of the test item FAT 41001/H according to the European Commission Regulation (EC) No.440/2008, A.8. partition coefficient n-octanol / water and OECD 107 and OECD 117, partition coefficient n-octanol/water were used to performed the experiment.

The partition coefficent n-octanol/water of the test item at 20 °C, from the individual solubilities in water and n-octanol, was determined to: log Pow = -3.88

Description of key information

The purpose of the study was determination of the partition coefficient n-octanol / water of the test item FAT 41001/H according to the European Commission Regulation (EC) No.440/2008, A.8. partition coefficient n-octanol / water and OECD 107 and OECD 117, partition coefficient n-octanol/water were used to perform the experiment. The partition coefficient n-octanol/water of the test item at 20 °C, from the individual solubility in water and n-octanol, was determined to: log Pow = -3.88


Key value for chemical safety assessment

Log Kow (Log Pow):
-3.88
at the temperature of:
20 °C

Additional information

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